My son’s robotics club (Newport Robotics Group, FIRST FRC #948 in Bellevue, WA) is always looking for cheap easy give aways for the kids and to the other teams. I think I’m in love with the two layer acrylic from inventables. I used it for the first time this week. I’m playing with an epilog at work (same one @macphee uses)
You raster blast away the top layer (in this case neon yellow) to reveal the bottom layer (in this case black) and you can still vector cut to size whatever you would like. Comes out really crisp
BEWARE - if you do too many at once and pack them in (like i did trying to be efficient and all that…) you end up warping the board from the heat you’re giving one ply of the material and not the other - then the board warps and you lose some yield on the parts due to having to toss the ones that were not within the focus of the laser and it’s more likely to start burning (i.e. it starts burning).
but even with that I had plenty that were usable.