Document 6bO5j1Jrn5D96Db7mJoV1EzOo

DATE: TO: Mr. J. B. Moss LOCATION FROM: L. E. Winter LOCATION: SUBJECT: Comparison of Seven All Purpose Compounds August 31, 1971 Tigard Acme PLAINTIFF'S EXHIBIT GP-772 wc PH Bond Workability Shear Shrinkage Edge Crack Wedge Crack Hardness Adhesive Viscosity Working Time GP (Gypsum) 60 8. 7 100% Good OK Good Good Good OK Vinyl 440 30 min. GP Sterling (Casein) Gold Bond U.S.G. Texas In-Tex 60 9.0 100% Fair OK Good Good Good OK Casein 440 20 min. 70 8.4 100% Good OK Fair Good Fa ir OK Casein 580 30 min. 72 8.3 30% Fair OK Good Good Good Soft Casein 520 35 min. 68 60 8.35 8.7 100% 100% Good Good OK OK Fair Fair Good Fair Poor Very Poor OK Hard Starch S tarch 460 460 35 min. 30 min. 60 8. 85 100% Poor OK Fair Good Poor Hard Starch 460 10 min We listed the different brands in order of quality, GP being #1 and In-Tex #7. SGP 0015862