{"id":558,"date":"2014-03-07T15:50:32","date_gmt":"2014-03-07T14:50:32","guid":{"rendered":"http:\/\/pansarper.blink.se\/?page_id=558"},"modified":"2021-12-03T09:58:00","modified_gmt":"2021-12-03T08:58:00","slug":"airbrush-rengoring","status":"publish","type":"page","link":"https:\/\/pansarper.blink.se\/?page_id=558","title":{"rendered":"Airbrush-reng\u00f6ring"},"content":{"rendered":"<p>Efter trehundrafuttifjorte airbrush-session med kr\u00e5nglande spruta googlade jag och hittade f\u00f6ljande eminenta sida d\u00e4r Don i detalj g\u00e5r igenom hur man ska reng\u00f6ra sin spruta och varf\u00f6r den beter sig som den g\u00f6r <a title=\"Dons Airbrush Tips\" href=\"https:\/\/sites.google.com\/site\/donsairbrushtips\/\" target=\"_blank\" rel=\"noopener\">https:\/\/sites.google.com\/site\/donsairbrushtips\/<\/a><\/p>\n<p>Jag fr\u00e5gade Don om jag fick kopiera texten f\u00f6r att inte gl\u00f6mma bort den, s\u00e5 h\u00e4r \u00e4r den nu med Dons ben\u00e4gna tillst\u00e5nd:<\/p>\n<div><span style=\"font-size: x-large;\">F<\/span>or me, the most important rule of cleaning is: Don&#8217;t put it off. \u00a0 Dried paint is a lot harder to remove.<\/p>\n<p>A lot of people will tell you that all that is needed to clean an airbrush is to flush it out with an appropriate thinner until it sprays clear. \u00a0My experience is that this doesn&#8217;t always work. \u00a0 Sometimes I would find the needle stuck the next time I went to use the brush. \u00a0I suspect a little paint leaks inside the needle bearing and drys. \u00a0So, I always remove the needle and wipe it with a little thinner. \u00a0This only takes a minute, and it solves the stuck needle problem. \u00a0I also use an old paint brush to clean the front surface of the nozzle.<\/p>\n<p>I keep a special bottle of thinner for cleaning, and pour a small amount in a glass cup for use. \u00a0When I&#8217;m done, the excess goes back in the bottle. \u00a0By the next cleaning, most of any pigment has sunk to the bottom. \u00a0As a last step in cleaning, I always spray a little really clean thinner.<\/p>\n<p>I usually go ahead and\u00a0 remove the head and wipe out the body and tip with thinner too. \u00a0It&#8217;s very easy to do on the 155, it just takes a couple minutes more, and I&#8217;m sure of having a clean brush. You can use an inter-dental brush for this, or I&#8217;ve found that a pipe cleaner fits nicely in the front and bottom openings in the body of the 155, and does a good job. \u00a0A pipe cleaner can leave little bits of fuzz, so after using one, I squirt a little thinner through the brush with an eye dropper to wash out any stray fibers. \u00a0I also use a pipe cleaner to clean the paint cup spout.<\/p>\n<p>One way to clean the tip is to take the corner of a paper towel and roll it into a point. \u00a0Then dip it in thinner and poke it in the large end of the tip and twist until you can see a bit of it on the small end. I learned this on one of the forums.<\/p>\n<p>If you are using a water based cleaner, it might be easier to insert the towel dry and then add the cleaner. \u00a0Water tends to soften the towel a lot.<\/p>\n<p>To hold the tip for cleaning, I modified a wooden clothes pin by cutting it off and filing a little groove next to the ends. \u00a0Using it, I can easily pick up the tip from the bench and hold it securely. It eliminates a lot of fumbling.<\/p>\n<p>Before re-installing the tip, I lightly rub the opening in the airbrush body that the tip fits against with a small piece of bees wax. \u00a0It&#8217;s just a little insurance to guarantee a good seal and avoid bubbles in the cup.<\/p>\n<p>Some airbrush parts have very fine threads.\u00a0 Be careful not to cross thread them.\u00a0 If your airbrush is the type with a tiny screw-in nozzle, be very careful not to over-tighten it. \u00a0In fact, if you have the tiny screw-in nozzle, it might be better to just leave it in place.<\/p>\n<p>Make sure the trigger is fully in place before trying to run a needle through it. When I insert the needle into the body, I hold it loosely. \u00a0That way, if I miss the hole, the point won&#8217;t be damaged. I push the needle in until I can feel it bump against the nozzle. \u00a0There should be some drag going through the needle bearing. You don&#8217;t want to push too hard or you may distort or split the tip of the nozzle. \u00a0I tighten the needle chuck and work the trigger to see that it feels right. \u00a0For me, the needle is the first thing out and the last thing in.<\/p>\n<p>As a final touch, I turn the brush upside down, put a little clean thinner in the paint supply hole and shoot it out. \u00a0And that&#8217;s all I ever do. \u00a0I&#8217;ve read that some folks regularly disassemble their brushes and soak them in cleaning solutions and some even buy ultrasonic cleaners. \u00a0I personally have never seen a need for this.<\/p>\n<p>Cleaning doesn\u2019t have to be a hassle.\u00a0 It\u2019s just a matter of figuring out where the paint goes and finding the easiest way to get rid of it.\u00a0 If it\u2019s a through passage and the solvent is strong enough, aggressive flushing might do.\u00a0 I\u2019ve found that a pumping action with an eyedropper works pretty well.\u00a0 If it\u2019s a blind passage, like behind the cup, a quick swab with a tiny brush or pipe cleaner might be needed.\u00a0 Each of my airbrushes has its own quirks, and I alter the process to fit.\u00a0 A quick inspection with a magnifier and strong light source will show if it\u2019s good enough.<\/p>\n<p>Back Flushing<\/p>\n<p>Back flushing means holding something like your finger or a paper towel over the nozzle of the airbrush while pressing down and pulling back slightly on the trigger. \u00a0This forces air back through the tip and into the paint cup, causing bubbles. \u00a0It is commonly recommended as part of the cleaning process. \u00a0Supposedly, it breaks paint free and helps to wash it out. \u00a0But here&#8217;s how I figure. Yes, it will cause bubbles in the paint cup. \u00a0But, in the narrow passageway leading to the nozzle, all you&#8217;re going to get is dry air blowing through. \u00a0To me, this does not seem like a \u00a0useful thing to do. \u00a0Anyway, I&#8217;ve tried it and I can&#8217;t see where it makes any difference, so I don&#8217;t do it.\u00a0 I feel like I get better results with a pumping action from an eyedropper in the paint supply port of a siphon fed airbrush, or the cup of a gravity fed brush.\u00a0 But,\u00a0try it yourself and see what you think.\u00a0 I do sometimes back flush to mix paint and thinner in the cup just before painting though.<\/p>\n<p>Please note:\u00a0 Since I first wrote this section, I&#8217;ve come to realize a value of back flushing that I had not considered earlier.\u00a0 In most airbrushes, there is a narrow channel between the needle seal and the internal paint chamber.\u00a0 This channel can collect paint.\u00a0 By back flushing during cleaning, some solvent could be forced into this space and help keep it clear.<\/p>\n<p>If the shape of your airbrush nozzle makes it difficult to back flush because it has a crown or forked design, try holding the rubber bulb from an eyedropper over it.<\/p>\n<p><b>Airbrush Lube<\/b><\/p>\n<p>When I bought the brush, I also bought some store brand airbrush lube and applied it to all the moving parts. \u00a0After some time, I noticed that the trigger action was a bit stiff. \u00a0I found that the lube had gotten sort of gummy. \u00a0I suspect it was nothing but glycerin with a little food coloring. \u00a0So I cleaned everything and put a tiny bit of sewing machine oil on all the metal parts that rub together. \u00a0I usually don&#8217;t lube the needle because I decided that lubing Teflon was kind of redundant. \u00a0The trigger movement has felt fine ever since.<\/p>\n<section id=\"h.6ea30b273ed4dbe_4498\" class=\"yaqOZd LB7kq gk8rDe\">\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-uQSCkd purZT-AhqUyc-II5mzb pSzOP-AhqUyc-qWD73c JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4501\" class=\"hJDwNd-AhqUyc-uQSCkd jXK9ad D2fZ2 OjCsFc wHaque GNzUNc\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd mGzaTb baZpAe lkHyyc\">\n<h1 id=\"h.p_ID_13\" class=\"CDt4Ke zfr3Q duRjpb\" dir=\"ltr\">Troubleshooting<\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4502\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-uQSCkd purZT-AhqUyc-II5mzb pSzOP-AhqUyc-qWD73c JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4505\" class=\"hJDwNd-AhqUyc-uQSCkd jXK9ad D2fZ2 OjCsFc wHaque GNzUNc\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd mGzaTb baZpAe\">\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">I have monitored several airbrush and modeling forums and I&#8217;ve seen a lot of postings about airbrush problems. People try to help, but sometimes it\u2019s pretty tough. How do you respond when somebody writes: \u201cMy airbrush doesn\u2019t work. What\u2019s wrong with it?\u201d Okay, that&#8217;s an exaggeration, but not by too much. So if you ask for help, try to give as much information as you can. Include the airbrush brand and model, the type and brand of paint, the air pressure, exactly what the symptoms are, and what things have you tried so far. I know this is just common sense, but many people just don\u2019t think about it. And, if you do get help, please come back with the results, and maybe even say thanks. Not only might you be helping someone else with the same problem, but the person who helped you might be more inclined to help you or others in the future.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">You will probably be advised to clean your brush again. This is a pat answer, and often it works. And you may be frustrated because you know you\u2019ve cleaned the darn thing several times already. But it doesn\u2019t take much dirt to mess up an airbrush&#8217;s operation. A tiny piece of lint can do it. I would suggest you use a magnifying glass (the stronger the better) and a good source of light and really examine all the parts.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Some airbrush problems are really paint problems. Before you blame the brush, see how it works with plain water or thinner. Paint has to be really thin to work in an airbrush, especially if it has one of the smaller size nozzles like .2 or .3mm.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">If you haven&#8217;t read my <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/sites.google.com\/site\/donsairbrushtips\/basic-stuff\"><strong>Basic Stuff<\/strong><\/a><\/span> page, you might want to have a look at it. It may make the information below easier to understand. As you can see if you\u2019ve read that page, the airbrush is basically a pretty simple device. But it is a precision device, and tolerances are tight.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">One other thing; spare parts are nice to have, especially the needle and nozzle. You can quickly eliminate these as the cause of your problem by swapping them out.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">So what kind of things can go wrong?<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>No air comes out<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Obvious question: Did you disconnect the air line from the brush and check that your compressor or other air source is supplying plenty of air?<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4506\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-II5mzb JNdkSc L6cTce-purZT L6cTce-pSzOP\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\"><\/div>\n<\/div>\n<\/div>\n<div class=\"hJDwNd-AhqUyc-wNfPc purZT-AhqUyc-II5mzb pSzOP-AhqUyc-wNfPc JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4509\" class=\"hJDwNd-AhqUyc-wNfPc pSzOP-AhqUyc-wNfPc jXK9ad D2fZ2 OjCsFc wHaque\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd baZpAe\">\n<div class=\"t3iYD\"><img decoding=\"async\" class=\"CENy8b\" role=\"img\" src=\"https:\/\/lh6.googleusercontent.com\/BgJYK0tdCnL5G-5k8fQSN1IUoNIr4tpuxks8yxd6KL7FWECKUCnk2ho42TxuvXuyqq5Jov-p00a9u80BuUHjGX4ds2JpcAEMh1cmUXTQb34XiMJU=w1280\" \/><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"hJDwNd-AhqUyc-c5RTEf JNdkSc L6cTce-purZT L6cTce-pSzOP\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4510\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-uQSCkd purZT-AhqUyc-II5mzb pSzOP-AhqUyc-qWD73c JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4513\" class=\"hJDwNd-AhqUyc-uQSCkd jXK9ad D2fZ2 OjCsFc wHaque GNzUNc\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd mGzaTb baZpAe\">\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Some trigger mechanisms are tricky to install. Are you sure yours is in right? Can you feel the air valve spring when you press the trigger? If you remove the head assembly, there is a little hole in the main body where air should come out when you press the trigger. See the photo on the right for its location on the 155. If air does come out, then the problem is probably something clogging the head assembly. Hopefully, there is no dried paint blocking this little hole. If there is, you may have to soak the body in something to soften it so it can be blown out. Be sure to remove the air valve assembly before doing this.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4514\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-II5mzb JNdkSc L6cTce-purZT L6cTce-pSzOP\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\"><\/div>\n<\/div>\n<\/div>\n<div class=\"hJDwNd-AhqUyc-wNfPc purZT-AhqUyc-II5mzb pSzOP-AhqUyc-wNfPc JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4517\" class=\"hJDwNd-AhqUyc-wNfPc pSzOP-AhqUyc-wNfPc jXK9ad D2fZ2 OjCsFc wHaque\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd baZpAe\">\n<div class=\"t3iYD\"><img decoding=\"async\" class=\"CENy8b\" role=\"img\" src=\"https:\/\/lh6.googleusercontent.com\/Y2p1Of-nWZ6p9IEPOOfrWMSK9oE1Skd--7EwJBLbXXd4MGpCpRhtsTtkiifsBL7DFYqJ_UL88iW8gf7mmIq7e-Z6MQvRg6c4vrI72nTEoPDUghbL=w1280\" \/><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"hJDwNd-AhqUyc-c5RTEf JNdkSc L6cTce-purZT L6cTce-pSzOP\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4518\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-uQSCkd purZT-AhqUyc-II5mzb pSzOP-AhqUyc-qWD73c JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4521\" class=\"hJDwNd-AhqUyc-uQSCkd jXK9ad D2fZ2 OjCsFc wHaque GNzUNc\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd mGzaTb baZpAe\">\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">If air doesn&#8217;t come out, then the only thing left is the air valve assembly. Be very careful if you dismantle it. There are some very small parts and a tiny spring. See the photo on the right of a Badger air valve assembly. There is probably a little rubber O-ring that could be damaged. If you\u2019ve gotten lacquer thinner on it, it may have swollen enough to jam. It may return to normal if you let it air out for a few days. If not, you may have to replace it. Make sure all the parts are clean and work smoothly. Many advise applying airbrush lube. I don\u2019t, but I guess it couldn\u2019t hurt.<strong>Sticky Trigger<\/strong> For some reason I seem to see this problem most often from Iwata owners. They usually write that they clean the air valve assembly, and it works OK for a short time and then begins sticking again. Sometimes they mention finding paint residue in the valve. If there is paint, where did it come from? The only possible source is through the needle bearing. Either they are pulling the needle out when there is still paint in the brush, or the needle bearing is leaking. In some airbrushes there is an adjustment on the needle bearing that might stop a leak. If not, or if that doesn&#8217;t work, the bearing needs to be replaced.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In some airbrushes, the trigger pin passes through a rubber o-ring. It may need a tiny bit of lubrication. Most users and manufacturers recommend regular airbrush lube.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Note: I got an e-mail from Rick Bradley. An Iwata technician told him to use the back of the airbrush needle to insert lube in the trigger pin opening. Of course, you have to remove the trigger to do this. Thanks for passing that on, Rick.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">For Harder &amp; Steenbeck owners: I saw a <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"http:\/\/www.youtube.com\/user\/florymodels#p\/a\/u\/2\/gFQ2YnoN_VY\" target=\"_blank\" rel=\"noopener\"><strong>video<\/strong><\/a><\/span> by <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"http:\/\/www.google.com\/url?q=http%3A%2F%2Fwww.promodeller.com%2F&amp;sa=D&amp;sntz=1&amp;usg=AFQjCNGvrhdlKSDG74RxQbY-3bQvbt1UpA\" target=\"_blank\" rel=\"noopener\"><strong>Pro-Modeller<\/strong><\/a><\/span> that showed that the trigger can stick if the air valve assembly is too tight. You might want to watch it.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Bubbles in the paint cup<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4522\" class=\"yaqOZd\">\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-II5mzb JNdkSc L6cTce-purZT L6cTce-pSzOP\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\"><span style=\"font-size: revert; color: initial;\">This seems to be the most common problem people have with their airbrush. It shows up regularly on the forums I monitor. First, make sure the head assembly isn&#8217;t loose. Snug it up, but don&#8217;t over-tighten or you might strip the threads. If that doesn&#8217;t do it, then consider this. The only way bubbles can happen is if there is a leakage from the air path to the paint path. Now look closely at your airbrush. If you have the type with a floating nozzle (aka tip), there is no gasket between it and the main body of the brush. In the photo on the right, the arrows point to the surfaces where the parts mate. Paint flows inside the nozzle and air flows on the outside. The only thing keeping them apart is the metal to metal seal. This seal is only good if both the nozzle body and the hole it fits into are perfectly round and dirt free. One way to see if there is a problem here is to rub a little bees wax on this part of the nozzle and see if the bubbles go away. If they do, you may need a new nozzle.<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4530\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-wNfPc purZT-AhqUyc-II5mzb pSzOP-AhqUyc-wNfPc JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4533\" class=\"hJDwNd-AhqUyc-wNfPc pSzOP-AhqUyc-wNfPc jXK9ad D2fZ2 OjCsFc wHaque\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd baZpAe\">\n<div class=\"t3iYD\"><span style=\"font-size: revert; color: initial;\">If your airbrush has a screw-in nozzle like the one on the right, you may have a gasket, possibly made of Teflon, to seal off the nozzle to body joint. You didn\u2019t lose the gasket did you? Over time, these gaskets can be compressed enough that they leak. This is an easy fix. Just replace the gasket. I&#8217;ve also found that a little lip balm, like Chapstick, on the threads can solve the problem.<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4538\" class=\"yaqOZd\">\n<div class=\"IFuOkc\"><\/div>\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-II5mzb JNdkSc L6cTce-purZT L6cTce-pSzOP\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\"><span style=\"color: initial; font-size: revert;\">If you have a tiny screw-in nozzle like the Iwata HP-CR on the right, you may need some sealant like bees wax or lip balm on the threads. Be extremely careful not to over tighten it. The only other place that air can get into the paint path is at the tip of the nozzle, like when you back flush by holding your finger or a paper towel against it. A tiny crack in the end of the tip can cause bubbles. Check it closely with a magnifying glass. I\u2019ve read that paint build-up can occur here and also cause bubbles. I\u2019ve never seen this, but it&#8217;s worth checking for.<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"h.6ea30b273ed4dbe_4542\" class=\"yaqOZd\">\n<div class=\"mYVXT\">\n<div class=\"LS81yb VICjCf\" tabindex=\"-1\">\n<div class=\"hJDwNd-AhqUyc-uQSCkd purZT-AhqUyc-II5mzb pSzOP-AhqUyc-qWD73c JNdkSc\">\n<div class=\"JNdkSc-SmKAyb\">\n<div class=\"\">\n<div class=\"oKdM2c Kzv0Me\">\n<div id=\"h.6ea30b273ed4dbe_4545\" class=\"hJDwNd-AhqUyc-uQSCkd jXK9ad D2fZ2 OjCsFc wHaque GNzUNc\">\n<div class=\"jXK9ad-SmKAyb\">\n<div class=\"tyJCtd mGzaTb baZpAe\">\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In order to create a vacuum to pull paint out of the brush, the nozzle has to protrude just a tiny bit past the front of the spray regulator. If it doesn&#8217;t, you can get pressure instead of a vacuum here and air will blow back into the cup or bottle. This can be a problem in airbrushes with rubber O-rings in the head assembly.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Intermittent spraying<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">This can be caused by the same things listed above for bubbles in the cup. For a siphon fed brush, it can also be caused by a worn needle bearing or seal. See my page on <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/sites.google.com\/site\/donsairbrushtips\/badger-needle-bearing\"><strong>replacing the needle bearing<\/strong><\/a><\/span> for this. Make sure it isn\u2019t a paint problem.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Continuous Paint<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">A common problem is that paint will spray as soon as you press the trigger for air, even before pulling back the trigger. This happens because of an imperfect seal between the needle and nozzle. It sometimes doesn&#8217;t show up at lower air pressures. It can be caused by a small particle of dirt or dried paint in the nozzle, or a needle or nozzle that is not perfectly round. At low pressure, there is not enough vacuum to overcome the paint viscosity and pull it through the small opening. When the pressure is increased, so does the vacuum and paint is expelled.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Sometimes, it can be fixed by rotating the needle in the nozzle with slight pressure. Some people apply a little pressure to the back of the needle when they tighten the needle chuck. But, you have to be careful not to damage the nozzle. Soaking the nozzle in a solvent that dissolves dry paint may also help.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Another possibility is that the needle seal is too tight for the trigger return spring to fully seat the needle. You may be able to adjust the trigger tension or the needle seal. You should feel a little drag when you install the needle, but it shouldn&#8217;t take much force.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">If you have polished the needle, you may have caused it to go out of round. If you have spares, try swapping parts to find the culprit.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Air but no paint<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Maybe your paint is too thick or has lumps. You could try cranking the air pressure up a little to increase the vacuum, or you could see if the problem goes away when you spray plain water or thinner.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Sometimes people forget to tighten the needle chuck. They pull back on the trigger, but the needle doesn\u2019t move; easy to fix once you notice it.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Sometimes, if the needle is stuck from dried paint, the needle chuck will slip when you pull back the trigger, even though you tightened it. So, check to see that the needle is really moving.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Make sure there is a vent hole in the cap of your siphon bottle or paint cup lid. Otherwise a vacuum will form and stop the paint from flowing.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In a siphon airbrush, a really leaky needle seal or needle bearing can cause this. To check for this, turn the airbrush upside down and put some water in the paint inlet. If it sprays OK in this position, then the seal may be bad. It may be adjustable or it may need to be replaced.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Bad spray pattern or spatters<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Take a close look at the needle and nozzle. A bent needle or cracked nozzle can cause this. Acrylic paints seem to cause some problems. I\u2019ve never used them so I can\u2019t comment. You can feel for a tiny burr on the tip of the needle by running your fingernail lightly along it.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Works for a while, then doesn\u2019t<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">I see this once in a while on the forums. The user says the airbrush works fine for a while, but before they can finish, it begins spraying bad or clogging and they have to stop and clean it. They often blame the airbrush.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Here\u2019s what I think. An airbrush is made of hard stuff, like metal or hard plastic. It isn\u2019t very likely to change much during a painting session. If it works when you start, it should work till you finish. So, what does that leave? The Paint! I doubt whether anyone sees this problem spraying ink.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Paint can dry on the needle during use, especially if it is acrylic, and especially if the user is in the habit of lifting off the air before returning the trigger all the way forward. This is called tip dry, and is a fact of life when using acrylics, and even somewhat with enamels. Some airbrushes are more prone to this than others, but I believe they all have it to some extent. You can use a brush or Q-tip and solvent to remove it or, like many artists, use your fingernails to pick it off. Sometimes a blast of paint on some scrap will remove it. If you watch many airbrush videos, you will see artists doing this often.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Another likely cause is lumps in the paint. If you don\u2019t keep your bottles clean, paint can dry around the mouth of the jar. Then, when you stir or shake, little bits can fall into the bottle and end up in your airbrush. An airbrush does not like lumps. Here again, this is more likely with acrylics because of their fast dry times.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">So, before you blame the airbrush, clean it well, try some fresh paint or ink and see if the problem goes away.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Rough finish, orange peel, overspray, etc.<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Sorry to tell you this, but it probably isn\u2019t the brush.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">A rough sandpaper finish can happen if the airbrush is too far away from the object. The paint droplets partially dry before they hit and pile up on the surface.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Orange peel happens when the paint droplets don&#8217;t flow together to form a smooth coat. Try slowing down and applying the paint a little heavier.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Runs happen when the paint is applied too heavy, or it&#8217;s too thin. Thinner paint needs a thinner application.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Speckles are sometimes done on purpose to create a textured effect. Then, it&#8217;s called stippling. It happens when the air pressure is too low for the viscosity of the paint. It can also be done by placing something in front of the nozzle to bounce the paint particles around and scatter them.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">When the paint makes a splat, it&#8217;s called spidering. It happens when the paint is too thin, the pressure too high, or you are too close.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>It just doesn&#8217;t spray like it use to.<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Two parts that are very critical to the way an airbrush sprays are the nozzle, or tip, and the needle. Over time, the nozzle can be deformed by pressure from the needle and take on a slight trumpet shape. Both the needle and nozzle can wear from abrasion of paint particles. And, the needle profile may have been altered by straightening efforts or polishing. If your airbrush still works, but not as well as it once did, you may find that a needle\/nozzle replacement will bring it back to its old self.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Air Hose Leak<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">If you have a leak at either end of the air hose, don&#8217;t bother trying to stop it with Teflon tape or sealant on the threads. They are not meant to seal. The seal is inside the hose connector. In the Badger plastic hose, it is a cork washer. In the braided hose, it is a smooth metal surface. In my Iwata compatible Master hose adapter and Paasche hose, it is a rubber O-ring. In all three cases, it only works if it presses against smooth surface. So, the end of the airbrush connector and the compressor pipe must be smooth. A thin film of bees wax will help a lot. If you still have a tiny leak that only shows up with soap bubbles, don&#8217;t worry about it. Percentage wise, it&#8217;s insignificant.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Needle centering<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">If you look dead straight on at the front of an airbrush nozzle and pull back on the trigger, you may find that the needle pulls to one side. Some people notice this and think they have a bad airbrush. Not so. Here&#8217;s the problem. An airbrush needle is only supported at two points, the needle seal and the needle chuck. The distance from the seal to the front of the nozzle can be in excess of one inch. The nozzle diameter is a fraction of a millimeter. That&#8217;s an awful small target to hit. So, it is common for the needle to end up slightly offset. Fortunately, it turns out it doesn&#8217;t really affect the spray pattern. Unless it is so far off that it binds, it doesn&#8217;t matter.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">What does make a big difference is the centering of the nozzle within the spray regulator. If this is off very much, the pattern will be distorted.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>So<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In general, when you first get an airbrush, look it over carefully and study the parts breakdown so you understand how it works. It&#8217;s pretty clear from some of the questions that are asked, that many people don&#8217;t. I remember one instance where a fellow couldn\u2019t get any paint out of his new brush. Then he discovered that he hadn\u2019t removed the protective cap. At least he was man enough to admit it.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Also, if you\u2019re still stuck, consider contacting the manufacturer or dealer. My only experience is with Badger and Coast Airbrush, and they both have excellent customer support.<\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\"><strong>Feedback<\/strong><\/p>\n<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">I got an e-mail from Alan Houtz about the sticking Iwata trigger. He said he was used to removing the needle on his siphon fed brushes even when there was some paint in the cup, and never had a problem. Then he got an Iwata gravity fed Eclipse HP-CS. Without thinking, he did the same thing and paint leaked back into the air valve and trigger assembly. I guess it made a real mess. He had to completely dismantle the brush and clean with solvent and micro brushes. He says there is an internal brass sleeve in the air valve that has to be removed for cleaning. To remove it he used a Q-tip soaked with thinner. He inserted it in the valve and used a little side pressure to remove the sleeve. After a thorough scrubbing, his trigger has worked fine ever since. So, I guess the lesson is; don&#8217;t remove the needle until the cup is rinsed clean.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Efter trehundrafuttifjorte airbrush-session med kr\u00e5nglande spruta googlade jag och hittade f\u00f6ljande eminenta sida d\u00e4r Don i detalj g\u00e5r igenom hur man ska reng\u00f6ra sin spruta och varf\u00f6r den beter sig som den g\u00f6r https:\/\/sites.google.com\/site\/donsairbrushtips\/ Jag fr\u00e5gade Don om jag fick kopiera texten f\u00f6r att inte gl\u00f6mma bort den, s\u00e5 h\u00e4r \u00e4r den nu med Dons&#8230; <a class=\"more-link\" href=\"https:\/\/pansarper.blink.se\/?page_id=558\">Continue reading <span class=\"meta-nav\">&#8594;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-558","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=\/wp\/v2\/pages\/558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=558"}],"version-history":[{"count":2,"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=\/wp\/v2\/pages\/558\/revisions"}],"predecessor-version":[{"id":1111,"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=\/wp\/v2\/pages\/558\/revisions\/1111"}],"wp:attachment":[{"href":"https:\/\/pansarper.blink.se\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}