6397. To Flatten Engravings or Paper that has been Boiled Up

6397.      To Flatten Engravings or Paper that has been Boiled Up. To succeed in this, take a roll of paper, wall-paper for instance, unroll a portion of it, and insert the paper or card-board, which is to be flattened, in such a manner that when the whole is rolled up again, the card-board will be bent the opposite way to which it was originally rolled. Roll up closely and evenly, and let it remain for about 15 minutes. If this be carefully done, the card-board will be flattened without danger of breaking, and free from the creases inevitably made if rolled backwards in the hands. If wall-paper be used, it should be as thick as can be obtained, and the larger the diameter of the roll, the better. Collectors of engravings will find it worth their while to obtain a straight roller, say 3 inches in diameter, and 5 or 6 yards of the stout paper sold in rolls or by the yard under the name of " pattern paper. The cost is trifling, and it will last for years.

6398. To Remove Water Stains from Engravings or Paper

6398.    To Remove Water Stains from Engravings or Paper. Fill a sufficiently large clean vessel with pure water; dip the engraving in, waving it backward and forward until wet through. Then fasten it to a flat board with drawing pins, and let it dry in the sunshine.

6399. To Bleach Engravings, etc.

6399.    To Bleach Engravings, etc.. Old engravings, wood cuts, and all Kinds of printed matter, that have turned yellow, are completely restored by being immersed in this preparation for only one minute, without the least injury to the paper, if the precaution is taken to thoroughly wash the article in water containing a little hyposulphite of soda. Undyed linen and cotton goods of all kinds, however soiled or dirty, are rendered snowy white in a very short time by merely placing them in the liquid mentioned. For the preparation of Javelle water, take 4 pounds bicarbonate of soda, and 1 pound chloride of lime; put tho soda into a kettle over the fire, add 1 gallon boiling water, let it boil from 10 to 15 minutes, then stir in the chloride of lime, avoiding lumps. When cold, the liquid can be kept in a jug ready for use. (See No. 4787 (Solution of Chloride of Potash).)

6400. To Clean Soiled Engravings

6400.    To Clean Soiled Engravings. Lay tho engraving, face downwards, in a perfectly clean vessel, sufficiently largo to allow the engraving to lay flat; pour clean boiling water upon it, and allow it to stand until the water is cold: take it out carefully and remove as much of the moisture as possible with clean blotting paper, then place the engraving in a press between clean white paper. If very much soiled, a repetition of the operation may be necessary.

6401. Fine Black Hair Dye

6401.    Fine Black Hair Dye. This is composed of two different liquids, No. 1, called the-mordant, which is employed to give permanency to the dye, and No. 2, which is tho dye itself. Take 1/4 ounce pyrogallic acid, 6 ounces alcohol, and 18 ounces water; shake them well together, and put tho mixture in a glass-stoppered bottle. This is the mordant, and must be labeled Solution No. 1. To prepare the dye, take 1 ounce nitrate of silver, 2 ounces ammonia, and 8 ounces distilled water ; dissolve in a stoppered bottle, and mark it Solution No. 2. This is a very fine article. (See No. 1201 (Beautiful Black Hair Dye).) Directions for using the above dye may be found in No. 1202.