Hi all, just starting out screen printing. I am getting small lines from the edges of transparencies after burning. I am guessing my burn time is still not long enough? 500wt halogen, 230, screen 2-1 coat. Any advise? Thanks.
tape them off before printing. i still get those and i've been doing it for 10 years. or coat your screen thicker.
Why use tape? I don't usually tape anything off anymore unless I'm in a hurry. I just blockout/fill them with emulsion. Grab an old credit card, dip it into your emulsion bucket, and swipe over the open areas of the screen carefully. Dry it with a hairdryer. When you're done throw it back under the lamp for another exposure.
Yeah, a blockout pen or swipe with some emulsion will do the trick. That'll happen to me with a halogen work lamp setup. I assume the light's just getting refracted a bit at the edge of the transparency.
this. I've noticed there is much more chance of getting a little crack line if I cut film with a knife vs scissors. It's the light refracting. the longer the exposure, the less chance of these film edge lines showing.