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Originally Posted by ooo-ribay
Good info, as always.
We did some silk screening in HS (I think) shop class. I seem to remember using an X-acto knife to cut the stencil. What do you mean by “burning” a screen?
The Seattle screen is cool….do you own it?
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The screens were "burned" because the process involved exposing the screen to a UV light source before performing a "wash out" resulting in the stencil you saw above.
That green substance you see, called "emulsion," is photo sensitive. It's dry/hardened now; but, when it was first developed, the artwork/graphics would have been transferred to transparent paper; then placed atop the dried emulsion inside a dark room. After exposing it to a UV light source for a few minutes, the exposed parts of the emulsion would harden and become waterproof. The unexposed areas (covered by the artwork/graphics) would remain, however, water soluble. When hit with a blast of water, this area of the screen would blow out, creating holes for paint to pass through.
That's how these stencils were made....