Document reawjQpEQ768KR4mxDgENQoe7

OPERATING BULLETINS HISTORY SHEET Ofctt _ 2r7=k2------------- \ aucCTi __ ____ Perf-A--Tape Joint System cv Bnuxrri, % REVISION ________ CANCELS tEQUESTED st: J. 7. Gill, Besearch Department SUUETIN M. 61-7-22JU /roe.'A*e>ssioi Floats Because of current short supply of asbestos floats, plants to sake the following substitutions^in the manuftcture of Perf-A--Tape joint ceaentt tti g+i <nw cement: S% AUD (1:2) pics $ to 7i asbestos floats as required Tm-Ht the supply of asbestos floats is exhausted. Then use 2G? A20. 1ok alkaline ceaentt use present fonzula until supply of asbestos floats is exhausted, then use 13? AMD. Proposed sub3titiutioa will permit continued production of joint cement. Cement texture will be slightly grainiermore noticeable In the low alkinity formula than In the high. Qualify will not be otherwise impaired. Effect an costs will vary depending on the plant. At Gypsum, the current cost of asbestos floats is $19.01 per U lbs. and AMD $15.76. PUi.SE SICK 6ULUTI* hEE 3eot. 1 name .25.1 H. H. Huntsicker Initials Date Sinned rHk v*. -Zj-lM 1ir170-P 111 ~' H.~, G. .fSAbllison ~?xr~ Yin 170--7 C. W. Desgrey Jr 170-C K. H. Eckrota TLlMjL 170-1 J. R. Newberry 170-E P. E. Roberts _1Ss_ ~170-J J. P. Sanger J. IT. Timons J. 7. Butler xH -4&/K- H-3092 Bev. 6/U7 (U.S.A.) ClRCUliTED avu. V7 Operation, Mart Manager Datte HilLEO 3 -7- 4-9 3 "Sf "U ^ ' onizr SHEET 1- DP007 1029