Document 9140mBjzm7zEyxmLGmr49gYJD

PLAINTIFF'S EXHIBIT BiiS TWALL GYPSUM COMPANY ftrdmore October 27g 1958 Paoli Laboratory 1-Sr* J. I. Trolley BESTWAIL LIGHT ACOUSTICAL BAGS J. R. Watt - cw cc: Messrs. M. K. Powers - Akron K. W. Broun - Acme Myron Read - Port Dodge A. H. TenElshof - Grand Rapids*-*^ L. L. ELinn - Sigurd Our 3estwall Light Acoustical Plaster was originally formulated using Alexite perlite and directions on the bag are based on tests made on this material. When Alexite was no longer available we started using Panacalite perlite which requires somewhat less mixing water as a result the amounts of water shown in our directions for application on the back of the bag should be changed before additional bags are ordered. Refer to Plaster Bag Manual Direction #0-32. Under spray application 70-80 should be changed to 55-65. Under hand application 60-70 should be changed to 50-60. Will you please advise the bag supplier to make these changes. # -* * SGP 0005405