On 08/07/2018 18:54, Chuck Guzis via cctalk wrote:
I recall that new tapes would often come with a strip of (usually blue) silicone-ish tape ...
Yes, I remember those. Don't have a source for exactly equivalent material, but you might be able to use 3-5 mil sign vinyl if you could get it without the adhesive on one side.
I think I've seen it in kids' toys of the era, where various patterned pieces were cut from the stuff and assembled on something akin to a whiteboard.
The brand I'm remembering from the 1970s was Colorforms. Apparently still a thing. The www.colorforms.com site is alive.
--S.
