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ink density/coverage

Posted on Thu, 11 Mar 2004 at 13:49



I am screen printing color over color. I'm having problems with the second color coverage/desnity over the first. I've tried every screen to lay down more ink, but it doesn't work. I've tried some formulation work, but nothing yet. Any ideas formulation or printing wise?

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Anonymous says: what inks are you using...plastisols? posted on: Wed, 03/31/2004 - 2:50am
Anonymous says: Jason, In the Off-set/Flexo printing processes, we call these "trapping" issues. That usually means that the first colors are not sticky (ie Tacky) enough. Ask your self, what would happen if you put ...

Jason,
In the Off-set/Flexo printing processes, we call these "trapping" issues. That usually means that the first colors are not sticky (ie Tacky) enough. Ask your self, what would happen if you put jelly on a piece of bread, then tried to spread peanut butter on top of that? Istead of the other way around? You may have a rheaology issue, and running a 110m over a 355m will not cure it. Try reducing the 2nd, 3rd, 4th inks by 5-10% in order. (1-0%, 2-5%, 3-8%,4-10%), this is known as a graduated tack series. The only way mesh count will help in this situation is if color #2 is flashed(It's process magenta, isn't it?). Or if your using Plastisol inks and doing CMYK, get Wilflex's Genesis process series, it is twice the pigment load of most other process series, and has the fastest "recovery" rate I've seen, The dot structure will be higher, thus imparting a deeper mass-tone, giving you more room to "pick" ink film thickness in wet on wet jobs and still not look "Pissed out". Have fun, ---Thomas Dunn thomasdunn13@comcast.net

posted on: Sun, 06/27/2004 - 11:19am

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