release agent 0 5zinc stearate 1 71gelling agent alkaline earth 0 2 10metal oxide ca oh sub 21 28solvent optionalstyrene monomer 4 27fillers 0 75resin type microethylene 6 4nonresinous filler caco sub 3 43 7______________________________________ the following mix procedure is used to make the resin filler paste the resin filler paste is prepared by charging the resin to a cowles type mixture the 2 5 dimethyl hexyl 2 5 di peroxybenzoate dissolved in approximately half of the styrene is blended with the resin thereafter the dicumyl peroxide and mold release agent are added the resin type filler is then blended in following which the nonresinous filler is likewise added and thoroughly dispersed immediately before the resin filler paste is to be used a slurry of the gelling agent in the other half of the styrene is added and mixed for approximately three minutes after aging for one week a molded part approximately 0 100 inch thick was made using a male and female steel die set which was heated to 300 u00b0 f the female mold had a flat cavity 12 u00d7 18 by 1 inch deep sufficient of the above molding compound was placed in the mold cavity to form a part 0 090 inch thick a methylmethacrylate sheet 2 mils thick was placed on top of the molding compound and the male die was brought down into engagement therewith with a force of 1 000 lbs per square inch and was held at this pressure and temperature for 90 seconds thereafter the male die was raised to separate from the composite and sufficient colored polyester molding compound was placed on top of the methylmethacrylate layer to form an additional thickness of 0 008 inch the.