Good day to all. Not sure if this is [EE] or [OT] - trying for [EE]. I'm looking for an inexpensive sheet material that I can use for=20 epoxy molds. I have a product that is an epoxy blob about 1.5" x=20 1.1" by 0.5" thick. I need to find a faster way of making these epoxy blob= s. What I'm currently using is a piece of acrylic with a couple of dozen=20 pockets milled in it (all the way through). I cover the back side=20 with tape (for a seal), place my modules in the proper spots, then=20 pour epoxy and bake in an oven. The problem occurs when we go to=20 remove the cured epoxy blobs from the form - its time consuming even=20 though we swabbed the sides of the mold with mold-release compound. What I'd like to explore is using a sacrificial material that I can=20 break away from the epoxy blobs after the epoxy has cured. This=20 material must be capable of withstanding the about 100C cure=20 temperature in the oven. I have considered using 1/2" MDF - it machines quickly on a CNC=20 router and 1/2" thick material breaks fairly easily. But - I'd like=20 to find something a little more fragile if possible. I expect to have to make several thousand of these units. Is anyone aware of an inexpensive sheet material that machines=20 easily, can withstand 100C for an hour or so and breaks easily when I=20 need to snap these modules out of the form? I'm considering some form of high-density foam board but don't really=20 have any idea of what to look for . Suggestions gratefully accepted. Many thanks! dwayne --=20 Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax www.trinity-electronics.com Custom Electronics Design and Manufacturing --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .