Document zzaV9XdbKbvYbg8EBn674wK36

3&STWALL GYPSUM COMPANY Srdmora October 27, 1958 Paoli Laboratory Mr. J. I. Trolley BESTV'ALL LIGHT ACOUSTICAL SAGS J. R. ''att - cw cc: Messrs. M. M. Powers - Akron K. W. Brown - Acne Myron Read - Port Dodge A. H. TsnElshof - Grand Rapids'"*^ o. L. Flinn - Sigurd Our Bestwall Light Acoustical Plaster was originally formulated using AlaxLte 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 far application on the back of the bag should be changed before additional bags are ordered. Refer to Plaster Bag Manual Direction #D-32. Under spray application 70-60 should be changed to 55-65. under hand application 60-70 should he changed to 50-60. Will you please advise the bag supplier to make these changes. * * SGP 0018925