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    配方类型: PHOTOGRAPHY
    配方说明: Correcting Photographic Negatives (U.S. Patent 2,484,091)
    配方组成: Spar Varnish/5
    Lampblack/5
    The bleached area is then covered with this paint
    Sodium Bicarbonate/5
    Water/90
    Glacial Acetic Acid/5
    Glycerin/5
    Water/50
    Gluten/15
    Alcohol/5
    Resin Powder/25
    Color/To suit
    Turpentine or Paint Thinner/10
    Glycerin/5
    Cuprous Oxide/40
    Ground Powdered Glass/15
    Gum Arabic/20
    配制方法: The excess paint is removed by blotting and, while still moist, this solution is applied.
    The final solution is allowed to react with the ink and removes the paint over the lines, causing them to appear on the painted background.
    The correction is completed by polishing the treated portion with a mild abrasive.

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