screen printing > Screen Making
Tapeless Screens
zanegun08:
--- Quote from: T Shirt Farmer on December 15, 2020, 06:40:05 PM ---Zane this has been the jam for us, saved a boat load of coin and reduced our down stream a lot.
--- End quote ---
@T Shirt Farmer thanks for posting the photos.
I'll post some photos of our screens, we are doing a similar method but using screen glue - http://saati.mybigcommerce.com/ultrafix-sb5-plus-kit-2-part-frame-adhesive/ Ultrafix SB5 and applying it with a scoop coater around the edges.
I tried to do this back in 2015, maybe 2021 is my year.
I'll try to find some screens with permanent blockout, and our tape method on them. As well as take a photo of our garage can tape ball that we are producing daily that I would like to not do, as well as that tape is expensive!
Anybody else have a different method?
ericheartsu:
We run 25x36 rollers, and rarely ever tape or block out.
In fact our blocked out open areas typically interfere with our drum on our CTS, so we stopped doing that all together.
We only really tape on runs that are over 500pcs, or on runs that have super watery ink.
zanegun08:
@ericheartsu that's a good method as then you have lots of extra room on the edges and where ink may spill out anyhow would be outside the pallet area anyhow.
I attached photos of our screen, 23" x 31" statics, both coated and uncoated. The blockout is applied with a scoop coater, which I think is an ok method as no tape is needed like in this method here https://www.youtube.com/watch?v=c3G0B44L7UE&feature=emb_title
However, as you can see, we still are taping all 4 sides, as well as two strips where the edge of the squeegees hit. Which is something I need to address either by longer exposure times (Saati LED), post exposing all screens with metal halide (don't really like this option), different emulsion, rounding the edges of the squeegees, printing with less pressure.
For manuals we could easily not tape, however they still do because then they aren't having to clean the ink around the frames from the printers being messy. With water base that is easy, but plastisol isn't quite as easy as just spraying off with a hose.
Also, when I say tapeless I mean around the edges, still tape for the registration marks are ok by me.
T Shirt Farmer:
staff in back have to be mindful with pressure washer it will take out the glue if not careful. It does take considerable time to apply the glue. The wider the block out the more back spray in wash out booth. I would not have it another way just based on lower down stream flow with the spent tape.
Prince Art:
Our approach to tapeless was to use a coater that left maybe 1/2" uncoated @ edges, then use an ink card to dip & spread emulsion around the edges from the back side only. No glue, nothing permanent. It added maybe 1-2 minutes or so per screen in the screen room, and completely eliminated tape, which saved much more time in setup/takedown. As a manual shop, we still used 23x31 screens, with squeegees sizes to fit our pallets. Ink almost never even touched the frames - such easy cleanup. Got that idea from ZooCity I think (if not him, someone else here) who used 25x36 screens on their auto to accomplish the same thing.
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