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Author Topic: Emulsion question.  (Read 1738 times)

Offline RichNation

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Emulsion question.
« on: November 08, 2015, 09:42:30 PM »
I am new to screen printing so take it easy on me if this is a dumb question. Also, after searching the forum for a few I did not run across this question.

Right now I have a 16"x20" Ryonet UV screen exposure unit along with 20"x24" - 156 mesh screens.

For a printer I have the Epson 1430 with Rite Film WP Positives, but I do not have any RIP software.

When I exposed the screens, the emulsion was really hard to spray off (emulsion that was behind the print-out). I'm not sure
if that means I exposed to long or perhaps my ink is not dark/opaque enough.

Any information would be appreciated.
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Offline Colin

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Re: Emulsion question.
« Reply #1 on: November 08, 2015, 10:08:48 PM »
Do you have a stouffer strip/exposure calculator?
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Been in the industry since 1996.  5+ years with QCM Inks.  Been a part of shops of all sizes and abilities both as a printer and as an Artist/separator.  I am now the Ink and Chemical Product Manager at Ryonet.

Offline RichNation

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Re: Emulsion question.
« Reply #2 on: November 08, 2015, 10:31:56 PM »
Yes I do have a strip. I think that I messed up the results by spraying to much water, I'm not really sure how that part of the procedure actually goes.
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Offline Frog

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Re: Emulsion question.
« Reply #3 on: November 08, 2015, 11:18:31 PM »
Go down to the fourth or fifth post in this thread. I posted some links that may help.
http://www.theshirtboard.com/index.php/topic,8148.msg153067.html#msg153067
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Offline RichNation

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Re: Emulsion question.
« Reply #4 on: November 08, 2015, 11:59:52 PM »
Frog, thank you for the links. I am checking them out now.
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Offline RichNation

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Re: Emulsion question.
« Reply #5 on: November 09, 2015, 08:45:20 PM »
Looks like the issue was with my prints. After changing some settings in Illustrator I got really nice dark prints and the problem went away.

I suppose that means the print wasn't opaque enough and the UV lite was burning through the print and curing the emulsion.
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Offline Frog

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Re: Emulsion question.
« Reply #6 on: November 09, 2015, 09:01:22 PM »
Quote from: RichNation on November 09, 2015, 08:45:20 PM
Looks like the issue was with my prints. After changing some settings in Illustrator I got really nice dark prints and the problem went away.

I suppose that means the print wasn't opaque enough and the UV lite was burning through the print and curing the emulsion.

That'll certainly do it. Up to a point, that's pretty easy to check by holding your positive up to a light source and checking.
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