I have very easy exposing chemical making system for quality screen print. Instructions are below...Ammonium dicromate 10 gCalatak 100 gGelatin 25 gHot water (100 C) 1001. mix gelatin & hot water must be a cream effect2. mix then with calatak 100 g3. ammonium dicromate 25g mix with hot water 25ml & add to above paste.DONE...! and then little bit add some colour for see after expose your screen.then coat your home made exposing chemical for your screen & try to make your own print...exposing time is normal from your experience....Thanks,Amila Chandana.For more details- firstname.lastname@example.org
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wow thanks for the info.
what is Calatak?
To the best of my knowledge the photo-resist method uses some pretty specific chemicals - someone correct me if I'm wrong but I think you're stuck with off the shelf products, or using other screen printing methods.