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    配方类型: INKS AND MARKING COMPOUNDS
    配方说明: Multicolor Carbon Paper (U.S. Patent 2,559,608)
    配方组成: Victoria-Blue Base/4
    Vegetable Oil/14
    Oil Yellow BB/1.5
    Microcrystalline Wax (M.P. 67'C.)/4
    Carnauba Wax/29
    Cyclized Rubber/5
    REd Lake C/14
    Petrolatum/26
    Malachite-Green Base/1.5
    Lanolin/7
    配制方法: Mix intimately.
    The black ink thus obtained is coated on paper by one of the usual methods. On touching the black carbon copy with an aqueous solution of sodium hypochlorite at about 2% strength, blotting, and subsequent touching with dilute hydrochloric acid, the color of the copy changes gradually from black to a permanent red.

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