(1) Equal parts of cream of tartar and citric acid* powdered fine, and mixed together.. This forms the salts of lemon as sold by druggists. Directions for using. - Procure a hot dinner-plate, lay the part stained in the plate, and moisten with hot water: next rub in the above powder with the bowl of a spoon until stains disappear; then rinse in clean water, and dry. (2) Place the stained part flat in a plate or dish, and sprinkle crystals of oxalic acid upon it, adding a little water; the stains will soon disappear, when the linen should be well wrung out in two or three changes of clean water. (3) Dip the part in boiling water, and rub it with crystals of oxalic acid; then soak in a weak solution of chloride of lime - say 1 oz. to the quart of water. Under any circumstances,' as soon as the stain is removed, the linen should be thoroughly rinsed in several waters. (4) The Journal de Pharmacie d'Anvers recommends pyrophosphate of soda for the removal of ink stains. This salt does not injure vegetable fibre, and yields colourless compounds with the ferric oxide of the ink.
It is best to first apply tallow to the ink spot, then wash in a solution of pyrophosphate until both tallow and ink have disappeared. (5) Thick blotting-paper is soaked in a concentrated solution of oxalic acid and dried. Laid immediately on a blot, it takes it out without leaving a trace behind. (6) Muriate of tin, 2 parts; water, 4 parts. To be applied with a soft brush, after which the paper must be passed through cold water. (7) Hydrochloric acid and hot water, in the proportion of 8 of hot water to 1 of acid; if not strong enough, add more acid; when clear of stain, wash well and boil, to remove all traces of acid. (8) A weak solution of chloride of zinc. (9) On Furniture. - Put a few drops of spirits of nitre (nitric acid) in a tea-spoonful of water, touch the spot with a feather dipped in the mixture, and, on the ink disappearing, rub immediately with a rag wetted in cold water, or it will leave a white mark. It should then be polished with furniture paste. (10) Undiluted spirits of salts (hydrochloric acid) may be used in the same manner, with care.
(11) Printers' Ink
Put the stained parts of the fabric into a quantity of benzine, then use a fine, rather stiff brush, with fresh benzine. Dry and rub bright with warm water and curd soap. The benzine will not injure the fabric or dye.
• (12) Marking Ink. - Dissolve 1 oz. cyanide of potassium in 4 oz. water; this mixture is very poisonous, and should, therefore, be used with great caution. Moisten the stained part of the garment with this solution by dipping it into it, or by means of a small brush; and in a few hours the stain will be obliterated. (13) To a solution of strong cyanide of potiissium add a few grains of iodine. Repeated applications will remove any stain caused by nitrate of silver. (14) Grimm, in the Polytechnisches Notizblatt, proposes the following method for removing indelible ink and other silver stains without the use of cyanide of potassium. Chloride of copper is first applied to the tissue; it is next washed with hyposulphite of soda solution, and afterwards with water. It is said that this may be employed on coloured woven cotton tissues. For white cottons and linens, dilute solutions of permanganate of potash and hydrochloric acid, followed by the hyposulphite of soda and clear water, are preferable.
(15) Indian Ink
To remove a blot, dip a camel-hair brush in water, and rub over the blot, letting the water remain on a few seconds; then make as dry as you can with blotting-paper, then rub carefully with indiarubber. Repeat the operation if not all removed. For lines, circles, etc, dip the ink-leg of your instruments in water, open the pen rather wider than the line, and trace over, using blotting-paper and indiarubber, as for a blot. Applicable to drawing-paper, tracing-paper, and tracing-linen. If the surface is a little rough after, polish with your nail.
White cottons and linens, wash with cold water.
Coloured goods and silks, a weak solution of citric acid applied with the tip of the finger to the spot previously moistened with water.