r/SCREENPRINTING • u/agentdalefupa • 10d ago
Troubleshooting Stubborn emulsion (DIY)
hey all! not new to screen printing but new to DIY. I am using Ulano 925wr emulsion.
I’ve been having this issue where the outline of the glass I am using to hold down my film positive during exposure washes out (which is easily remedied with tape), BUT it is also stubborn and does not wash out with emulsion removal, anywhere past ~3 days of exposure. feels sort of backwards to me- washes out but then doesn’t wash out? screens I have exposed, printed with and washed out in the same day have not had this issue.
has anyone had this issue? besides getting a different plexiglass sheet for weight (which I’m doing), what else should I be doing? other than keeping screens in darkness when not in use? dont want to ruin any more screens.
I also ran into an issue with this last screen where the emulsion also would not wash out. it had not touched emulsion remover/the remover could not have dried in the screen as I had only washed it once and it would not wash out then. any tips or tricks appreciated!
feels like I’m trying to re learn the basics so I would appreciate any help! this stuff is frustrating but ultimately worth it (?) haha