Document B89aZ4pmaM6805DaoL8K2034w

FILE NAME: Johnson & Johnson (JAJ) DATE: 1966 July 13 DOC#: JAJ040 DOCUMENT DESCRIPTION: Memo RE Microscopic Examination of Museum Baby Powder Samples fyw m '^vtw w M Subject: Microscopic Examination Museum Baby Powder Samples S 1-- "" -- _ ' L--' W. H. Ashton New Brunswick, N. i. July 13, 1966 Museum # 3 p r o b a b l e 'type ol talc: 6 10 . 17 21 26 35 39 41 53 Approx. Date 1896 - 1910 Domestic Platy talc, ranging up to TOO .ffii'Cr'OH size. "Dominantly in 1-30 micron range. 1906 - 1910 Domestic Platy talc, appears coarser than previous sample - More large thick particles. 1910 - 1920 Domestic 1920 - 1930 Domestic or Xtal. Platy talc, noticeable amounts Of tremelite and carbonate which is not typical of current Xtal. talc. Thin platy talc, finer particle size than previous samples. Only trace amounts of carbonate and treraslite. 1930 - 1940 Italian Thin platy talc, larger in overall particle size. Large plates seem noticeably flat and thin. 1942 war Domestic or Ital. Finer grind, more granular and scaly talc present. Jan* 1944 war Same as (26), but coarser. Domestic March 1945 war Very Coarse, fibrous talc. Domestic Sept. 1945.war Domestic Granular and scaly - aggregates of fibrous to scaly talc are apparent. Aug. 1955 Xtal. Thin platy talc, ranging up to 100 micron plates. Protected Docum ent-Subject to Protective Order JNJNL81 000000268 \ *i6r. >* -2- Museum # Approx. Date 57 May 1959 Same as (53), but larger plates appear thicker. Ital. June 1983 ~ Ital. Flat platy talc similar to (53) Jan. 1964 Basically flat platy particles but larger general particle Bmtal Bxtra size than previous 3 talcs. 1 ft In regard to Italian tale the samples show an increase in coarseness in the period 1955 to 1959 and a return to 1955 fineness in the 1963 sample which appears identical to the most recent shipment* Microphotographs of the above set are attached. tab cc: Dr. R. L. Sundberg Dr. T. H. Shelley R. S* Russell \ Protected Document-Subject to Protective O rder JNJNLS1 0000002(7