![]() ![]() For example, for most textile applications (high density printing being and exception) an EOM of 20% is recommended. Anything more or anything less than the appropriate EOM can result in print problems. Without the ability to measure the EOM how would you know whether a print problem is stemming from an inappropriate EOM rather than the ink, the squeegee pressure, the substrate and all the other usual suspects who get blamed first?ĭave Dennings, in his article, Standardization in Screen Printing – Part 1, recommends the appropriate EOM for various mesh counts. The emulsion over mesh (‘E.O.M.’) ratio is used to determine the appropriate thickness of a coating of emulsion relative to the thickness of the mesh. The idea is to give the stencil sufficient shoulder to bridge the mesh threads properly and provide a good gasket with the substrate. Why would anyone need a stencil thickness gauge? Well, for a start, how do you know whether or not a screen is appropriately coated with emulsion for that particular mesh count if you cannot measure it? And secondly, you could be having print issues from time-to-time and not know that they are caused by a too-thin or too-thick coating of emulsion. For instance, how many shops own a stencil thickness gauge? How many just slap on a one-on-one coating of emulsion and hope for the best? Some shops are very particular about technical precision but most are not. The textile screen printing industry is still notorious for ‘winging it’ in some of the more technically tricky aspects of screen printing. How do you know whether you have a stencil of appropriate thickness if you cannot measure it?
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