screen printing > Non Textile

UV ink

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ericheartsu:
Anyone here screen any non textile stuff with UV ink?

We have the set up here at my shop, and the one person who did it left, so i'm learning how to do it, and i'm hoping there are some tips you guys can share!!

californiadreamin:
Tons of it! What are you printing?
General Rule of Thumb 355-420 mesh.
Used High Tension Static (aluminum/steel), or Roller Frames (critical)
Print stock size smaller than larger, until you get the hang of it.
80/90 Duro Squeeges, Smooth,Sharp,Nick Free (critical)
Use capillary films 2 mil, 3 mil. Can Coat inside emulsion for extra durability (critical)
Stay away from coroplast in the begining, If printing metals,make sure edges are burr
free(high tension frame will pop on a dime,expensive). Control Static on plastics, print on coated papers vs: uncoated. Print with correct off contact. (critical) Use butt registration/
small traps on all art, unless it is not critical,since uv inks are printed so thin,it is easier to
see. Wattage on UV unit? 200/300 wpi single lamp? I take it you are printing on a flatbed vs:cylinder press? If so single lamp ok, for most applications (speed). Be carefull with heat
sensitive stock for shrinkage/expansion etc. as it can be difficult for multi color registration
issues (mainly plastics). Used Fresh,Good Ink. Be carefull of to much light over press when
ink is in screen (uv).Don't overcure inks,on higher number multi color jobs (intercoat adhesion problems). Use same press washes as for PLASTISOL only. You are welome to call
me, because I type to slow and will be here all night!
Good Luck,
winston
(904)3430848

ericheartsu:
Thanks Winston!

we have a svecia press and a svecia dual bulb dryer. but i've just discovered that one of the bulbs is either out, or we blew a fuse. so i'm checking into that.

I'm pretty ritrama vinyl decals. We did our first run today on 355 mesh with Dobouit (sp?) nova black. simple one color design.

i'm going to buy some 380 mesh tomorrow, and hopefully some 420 next month!

Inkworks:
Winston had a great point about not over curing the first colours in multi colour print as it can cause significant adhesion problems in subsequent prints.  A decent UV puck for measuring the ovens cur rate is a great idea.

Welcome to the world of rapid ink curing!

StuJohnston:
I don't have much to add, but there might be an additive for the ink that you can use to make it work with uncoated paper. At least there is for one of the Nazdar inks. Speaking of Nazdar, I have found them helpful in answering questions about their various inks and how to use them. I am pretty jealous by the way, I am hoping to rid myself of solvent inks eventually. I hope that Nazdar gets their LED inks worked out well enough to make them ready for regular customers soon.

Oh yeah, there's a local guy that prints UV on calendered Ritrama that gets good results.

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