Document a12J051wbJ9GbYkYz5rGYp46y

fi e Colorado School of Mines Research Institute February 3 1977 CSMRI Project 10704 P.O. BOX 112 GOLDEN COLORADO 80401 PHONE 303 279-2581 CSMRI Mr. W. H. Ashton Johnson & Johnson Baby Products Company Research U. S. Route No. 202 Raritan NJ 08869 Dear Bill As per your verbal request we have examined two talc samples for the presence of quartz The samples identified as Italian ground Italian talc 1976 series J & J England and experimental talc 3-16-76P were subjected to heavy liquid separation and ray diffraction examination The results of this work show that the Italian whereas the experimental talc contains about were determined in the following manner talc contains about % quartz 8 ppm quartz These values Sample Wt g Wt % Wt % Qtz XRD Estimated in Original x Wt % Qtz = Sample Italian 2.8 sp gr 76 2.8 gr 0.777 0.009 2.02 0.028 50 2-3 % 6-9 ppm Very truly yours Jeny Krause Jerry Krause Senior Scientist Mining Division cjm Mineral Industry Research JNJ 000060592