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| Posted on 8/3/07 at 11:37 PM | |
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John-155/64 is about 85 microns thick when under 30 N/cm tension. Many printers try to determine stencil thickness by understanding mesh thickness. Usually, the question is about emulsion over mesh(EOM) and can be determined in percentages. You need this EOM to form a gasket. Capillary film will work its way into the cells of the mesh when you apply it. If you use a 40 micron thick piece of cap film and 50% goes up into the mesh, you will be left with EOM of 20 microns. I like 10 to 25% EOM. If your mesh thickness, under tension is 85 and 20 microns of cap film are proud of the mesh, you wind up with about 23% EOM. One advantage of cap film is it is easy to apply and can provide consistent results. The surface of your stencil can be smoother/less rough with cap film. There are application where this is very important. Cap film is easy to use. Look at some of the pics in this article. These are from direct emulsion after it is dry. The surface is not smooth and you can see the threads of the mesh thru the emulsion. Good Luck, Wes http://www.kiwo.com/Articles/Choosing%20the%20Right%20Emulsion%20for%20Your%20Application.pdf [Edited on 8/3/07 by bearwhiz] | ||
  
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