Shrink Plastic Transparency Test

3 August 2019

A project I’m woking on needs a piece of see-through stained glass. I can’t find a bit in the right size and shape so I’m experimenting with using shrink plastic.

-1- The easiest way to find out how big something has to be drawn to come out at the right size after shrinking is to make a ruler as a size test, with lines drawn 1cm and 1 inch apart. I’m using Crystal Clear Shrinkles and mine comes out with a scale factor of 2.66.

-2 and 3- Sharpies: pretty easy to get even, comes out kinda dark but good transparency when held up to the light (see image below).

-4, 5, 7, 9, 10- Windsor and Newton Promarkers: according to the internet these should work but I found them to be not great at this. Perhaps the colours I picked were too light, butI found I just kept getting a puddle of the clear alcohol solvent building up on top of the plastic and very little of the colour. The best result I got was using 3 separate layers drawn in a different direction, letting it dry between each, but Sharpies work much better.

-8- Crayola: these work well, you have to use sandpaper / wet and dry paper to roughen the surface first (or use the pre frosted stuff). It’s not really see-through when you’re done so it’s not the look I’m going for in this project but nice to see how they’ll come out for other stuff.

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