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Marking Ink (Less liable to mould It)

and less liable to mould. It is blue when first written with, but soon becomes an intense black.

Chrome Ink (Runge's Ink).

This ink is of an excellent blue-black, does not fade, and, as it contains no gum, flows freely from the pen. It does not affect steel pens. Take 1 oz. extract of logwood, pour over it 2 qts. of boiling water, and, when the extract is dissolved, add 1 dr. of yellow chromate of potassa. This ink can be made for twenty-five cents a gallon. If put into an old inkstand, it must be thoroughly cleansed, as ordinary ink decomposes chrome ink.

Non-corrosive Writing Fluid.

Dissolve sulphate of indigo (chemic or Saxony blue) in twelve times its weight of water, add carbonate of soda as long as any precipitate falls, dissolve this in 150 parts of boiling water, let it settle and use the clear portion. It dries nearly black, flows very freely, and will not corrode pens or paper.

Alizarine Ink. Leonhardi.

Digest 24 parts Aleppo galls with 3 parts Dutch madder and 120 parts warm water. Filter. Mix 1.2 parts solution of indigo, 5.2 parts sulphate of iron, and 2 parts crude acetate of iron solution. This ink contains no gum, cannot get mouldy; the tannate of iron is prevented from separating by the sulphate of indigo. Alizarine ink may be evaporated to dryness and formed into cakes.

One part with 6 parts hot water will then form an excellent writing fluid.

Indestructible Ink for Resisting the Action of Corrosive Substances. On many occasions it is of importance to employ an ink indestructible by any process, and will not equally destroy the material on which it A Purple-red Ink for Marking Line.

The place where the linen is to be marked is first wetted with a solution consisting of 3 drs. of carbonate of soda, and 3 drs. of gum Arabic, dissolved in 14 oz. of water, then dried and smoothed. The place is now to be written on with a solution composed of 1 dr. of chloride of platina dissolved in 2 oz. of distilled water, then allowed to dry. When quite dry, the writing is to be painted over with a goose's feather, moistened with a liquid consisting of one dr. of protochloride of tin dissolved in 2 oz. of distilled water. Blue and Indelible Black Ink.

Take of iodide of potassium, 1 oz.; iodine, 6 drs.; water, 4 oz.; dissolve. Make a solution of 2 oz. of ferrocyanide of potassium in water. Add the iodine solution to the second. A blue precipitate will fall, which, after filtering, may be dissolved in water, forming a blue ink. This blue, added to common ink, renders it indelible.

Carmine Ink.

Dissolve 10 grs. of the best carmine in the least quantity possible of solution of ammonia. Let it stand for 24 hours, and add 24 fl. oz. of distilled water.

To take out Spots of Ink.

As soon as the accident happens, wet the place with juice of sorrel or lemon, or with vinegar, and the best hard white soap, or use a weak solution of oxalic acid.

To take out Marking Ink.

Ordinary marking-ink is removed by wetting with a solution of cyanide of potassium, and afterwards washing with water. The cyanide must be is applied. For black ink, 25 grs. of copal, in carefully handled, as it is a violent poison. powder, are to be dissolved in 200 grs. of oil of lavender, by the assistance of a gentle heat, and are then to be mixed with 24 grs. of lampblack and gr. of indigo; for red ink use 120 grs. of oil of lavender, 17 grs. of Copal, and 60 grains of vermilion. A little oil of lavender or of turpentine may be added, if the ink be found too thick- A mixture of genuine asphaltum dissolved in oil of turpentine or benzine, amber varnish and lampblack, would be still superior. This ink is particularly useful in labelling phials, etc. containing chemical or corrosive substances. Ink Powder.

Take 4 oz. powdered galls, dried sulphate of iron, 1 oz.; powdered gum, 1 oz,; white sugar, oz.; to make a quart of ink with water or beer.