Document 60nDrky2kd7GXMBez7QKvgJg

PLAINTIFF'S EXHIBIT Fwm B40 :CM 3 `6 P*1TKS IN J- A. Bestwall Gypsum Company FOR Grand Rapids DATE ATTENTION OF Mr. A.H. TenElshof July 1st 1958 FROM Paoli Lab. SUBJECT LIGHT ACOUSTICAL PLASTER ANSWERING YOURS DICTATED BY J.R. tfatt - jmw ------------------------------------------------ ^p-- OFFICE '.ie want to make a comparative test of our regular light acoustical plaster and two formulas containing a slightly larger percentage of perlite. The batches to be made are as follows: Bentonite Clay (200 mesh) A ho.00 lbs 3 38.00 lbs Asbestos (Carey's 7-D) 76.50 lbs 72.00 lbs Plastering grade perlite (20 cu.ft.) 192.00 lbs 192.00 lbs Tetra Sodium Pyro Phosphate 0.h0 (6-| oz) .38 (6 oz) Ultrawet D.S. 0.66 (10^ oz) .62 (10 oz) 309.56 lbs 303.00 lbs Make one batch each of A, B and your regular formula GR-U06. Even though you may have some of the regular formula on the floor, make a fresh batch at the time you make the other two. Send us one hO lb. bag of each of the three batches. Be sure each is properly identified. You may ship the balance of the regular batch, but mark and hold the balance of batches A & B until we advise you as to disposition of same. SGP 0018841