Ren Shape is a complete line of rigid manmade board that is used by modelmakers(me),patternmakers, and tool and die makers. It comes in densities that you can dent with your fingernail to something nearing aluminum. Some tool makers actually make short run metal stamping dies with the high density stuff. The best place for us to get it is at a patternmaking shop. It is so expensive that they hate to throw away even the smallest pieces, but seem to be willing to let some go for the promise of a pen coming back. Most shops around here only use the red and a little green. I got the small ivory piece from the sales rep who stopped by. Of course he went home with the red and green pen I had shown on here earlier, wink wink, nudge, nudge!! Keeps the sample chain running! I'll look into a group purchase if others are interested.
I have a Universal Laser 25 watt machine, 12x24 bed, in the basement. It's right beside the 4'x8' CNC router. You know you are addicted to machines when .............
Rich