· lac dan a gum arabic (a) gum acacia (b) gum talha (black or brown unriefined) (c) gum copal ......
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- · Lac dan a Gum Arabic (a) Gum Acacia (b) Gum Talha (black or brown unriefined) (c) Gum copal ... Caustic soda-solid/fiakes Potassium hydroxide (caustic potash) (a) USA, Japan,
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Post on 31-Oct-2020
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