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screen printing => Screen Making => Topic started by: shirtshack on January 08, 2016, 09:03:30 AM
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On another post you will see I am testing EOM, but reading the forums I hear a lot of talk about resolution of half tone dot ect- Once I have finished with the EOM and tension I would like to try these tests to make sure my emulsion selection is good enough.
How would I go about testing this?
I use a epson 4800 with blackmax inks and Accurip software for my positives so I assume I need a good test file I can print, any body know where I can download one?
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I use a file that dottonedan created...
but this one works really nicely as well:
http://www.theshirtboard.com/index.php/topic,8018.0.html (http://www.theshirtboard.com/index.php/topic,8018.0.html)
to do this the 'right' way you may want a densitometer, however, you can certainly test with a file such as the above and eyeball until you get something that looks right from the 3%-95% range. (if you can get a nice smooth transition through that range, you're doing better than most shops).
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I would start here.
http://www.kiwo.com/expo-check/
You want to find the best exposure time that works with your emulsion and exposure unit.
One you get that dialed in, if you want you can make a small bar at the bottom of each logo you burn that has a halftone going from %0-%100 or %5-%95.
Sent from my XT1585 using Tapatalk
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I have an Amex Exposure calculator which appears similar to the KIWO, also have a strip that should expose and wash out to the 7 mark so I should be accurate with my exposure.
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once your exposure times are dialed, then I like messing with the rip, dotgain settings, coating techniques and washout techniques to get the best screens possible.