screen printing > Screen Making

Permanent Block-out

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Frog:
This just got mentioned in the tape thread.

Have you even heard of it? Do you use it? Which one?

tonypep:
Well I'm not so sure "permanent" is adviseable but here's the cliff notes for an article I wrote for Printwear about 100 ys ago:
First this method was developed for a company that prints discharge every day on rigid aluminium screens. We stretched our own frames and used painters tape to block out the print area of the screen; leaving app 3/4" of open mesh all around the frame. Screen glue was carefully applied along that open mesh (we used the 2 part cyanoacrilate). Carefully because any dings or imperfections can interfere with the coating procedure. The emulsion overlapped this "perimeter blockout" by 1/2" all around. After imaging the screen was temporarily blocked out using watered down leftover emulsion. Finally rubber tape was used all around the inside perimeter.
So its not for everyone but when perfected it can be a superior and less expensive procedure.
tp

Printficient:
We have one.  It is called Fastener.  Cost is $40 per qt. and $78 per gal. I have a couple of customers that are using it.  As Tony says you can only use it on static frames. 

Homer:
I have some here frogger if you want it, it's yours. I didn't care for it.

alan802:
I experimented with this very thing not too long ago.  I bought some Kiwo Estalan B Lacquer and applied to the screen where our scoop coater would overlap it by about 1/2" on each side.  I did 2 screens like this, in about an hour.  I'm sure we could knock the times down of application to a reasonable amount if we did it enough, but the entire process was an ass whipping for me and I gave up after 2 screens.  It's nice not to have to tape those 2 screens and I'd like to maybe revisit this again in the future if I can find a better or easier product to use.

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