Document rB4r5aq4ppbxY3dprbv4YOn2a

Joplin Insulation * / J /, ^ 1'^" MAY 18 1962 May 15* 1962 "pt^IrTriFP?" EXHIBIT S. A* Kolker Cincinnati Office Subject* Insulstic (Qrefco) Your letter 5*19-62 ;; Vfe have this letter and Mr* W, H. Boyd's comments about the making of Fibrous Adhesive* We note Qrefco has a supply of 7 - K - 15 Asbestos which has a Canadian Standard mesh rating of 0 - 0 - 2 - lb* The 7 - M grade we use is a slight ly smaller size having a screen size of 0 - 0 - 1 - 15* It also has the advantage of being $5*00 - $6*00 per ton leas expense* The material they have on hand will work, it's just more expensive. We use a ribbon mixer (dough mixer) for our blending of the silicate and fiber. Since there is so little difference in the fiber size, hardly noticeable, we are not sending a sgmple as requested, at. this time. tgjr?--- A, L. Jones ALJ/ss cc: J. P*' Barrington C UNR 000582 Kj1' 1 0 4 i