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To Remove Nitrate of Silver purpose

Chlorinated lime (chloride of lime) Stains. A solution of iodide of potassium will sometimes remove the color where it is a will freely dissolve iodine. Silver stains stain merely. moistened for a while with this solution will 6347. To Dye Gutta-Percha. Dissolve be converted into iodide of silver, which is sol- 1 ounce gutta-percha in chloroform, and add uble in iodide of potassium. The stains will grain of pure carmine, previously mixed with therefore have disappeared when the cloth, a little powdered gum and water; then distill after the foregoing treatment, is washed in off the chloroform and knead well the rewater. (See No. 385.) Perhaps the best maining gutta-percha. In the same way ulmethod of removing these stains is as follows: tramarine, ochre, oxide of chrome, &c., may The stained cloth is washed with a concentra- be used. ted solution of sulphate or chloride of zinc 6348. Το Clean Gutta-Percha. This and then touched with a piece of metallic can be done by using a mixture of soap and zinc. This same process may be used for the powdered charcoal, polishing afterwards with removal of ink stains in both cases without a dry cloth with a little of the charcoal on it. danger to the fabric. After the color has disappeared, they are washed first with pure water and then with water and soap. No visible traces of the stains are left behind. (See No. 3141.)