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What type of plastic is this

What type of plastic is this

(OP)
Please help me identify this type of plastic

I saw a cheap plastic toy with a area where it looks like there are two transparent mat finished layers of plastic film on top of each other. When you use a stencil or any hard object to draw on the top plastic it looks like it gets stuck on the bottom plastic only at the points where you apply pressure. The places where the two plastic layers stick to each other becomes much more clear (transparent) than the re around it where the two plastic layers are still separated. If you want to clear what you have drawn you just slide a slider between the two plastic layers which separate the two layers from each other and the then you have a clean slate to draw your next picture.

Please help me identify this plastic product i.e. trade name or type of plastic name.

Where would one be able to source this product.

Thnaks

RE: What type of plastic is this

Top layer is likely polyethylene, bottom layer (20+ years ago) would have been some type of wax.

RE: What type of plastic is this

Magic Slate https://www.google.com/search?q=mystic+writing+pad...

The patent: http://www.freepatentsonline.com/2663095.pdf
Which leads to 563 hits for "magic slate": http://www.freepatentsonline.com/result.html?sort=...

This says the top sheet was probably polyester: http://kellykilmer.blogspot.com/2008/09/magic-slat...

But this is so retro. The newest ones are LCD based:
http://www.brookstone.com/boogie-board?bkiid=Searc...

There are other variants of the same concept
> Etch-a-Sketch http://www.walmart.com/ip/Etch-A-Sketch/22626823
> MagnaDoodle/MegaSketcher, but it's based on a magnetic stylus that draws iron particles through a mesh screen. A magnetic swiper pulls all the particles back through the screen to erase
http://www.walmart.com/ip/Fisher-Price-Doodle-Pro-...
https://www.google.com/search?q=megasketcher&b...

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Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com: http://www.engineering.com/AskForum/aff/32.aspx

RE: What type of plastic is this

You might be able to make something like a silicone rubber work for the backing pad, or another high-tack elastomer (polyurethane?).

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