I tried jdphotochem and they are no longer stocking iodine crystals because they cannot ship them via postal service any longer for some reason. back to the hunt.
I could use some rubylith. I see it on eBay–am I concerned with thickness or tack-level? Do I just put two pieces together to avoid attracting massive quantities of dust?
Once again, my previous post a bit premature…I found a 20×24″ sheet of rubylith at Blick in Berkeley for about $5, it doesn’t have much tack to speak of.