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.