PHOTOGRAPHS ON SILK.

Photographs can be very effectively printed upon silk, satin, or other

fabrics. There are several methods of accomplishing this. A simple one

is the following:[2] The silk best suited for the purpose is that

known as Chinese silk, and this is first washed in warm water with

plentiful lather of soap, then rinse in hot water, and gradually cool

until the final washing water is quite cold. Next prepare the

following solutions: Tannin, 4 parts; distilled water, 100 parts.

Sodium chloride, 4 parts; arrowroot, 4 parts; acetic acid, 12 parts;

distilled water, 100 parts.

[2] From the "Encyclopaedic Dictionary of Photography," by the author.

The arrowroot is mixed up into a paste with a little of the distilled

water, and the remainder added boiling hot, with the acid and the salt

previously dissolved in it. When the solution is quite clear the

tannin solution is added, and the whole allowed to get fairly cool.

The silk is then immersed for about three minutes, being kept under

without air in the folds, and then hung up to dry, or stretched out

with pins on a flat board. The material is then sensitized by brushing

over with the following solution: Silver nitrate, 12 parts; distilled

water, 100 parts; nitric acid, 2 drops to every 3 ounces. Other

methods of sensitizing are by immersing in or floating on the silver

solution. After sensitizing, the material is dried by pinning on to a

board to keep flat. It is then cut up as required, and printed behind

the negative. Every care must be taken in printing to keep the

material flat, and without wrinkles or folds. It must also be kept

quite straight; otherwise, the image will be distorted. Printing is

carried on in the same manner as with printing-out paper. It is then

washed and toned in any toning bath. The sulphocyanide gives the best

action. Fix in a 10 per cent. solution of hyposulphite of soda for ten

minutes; wash and dry spontaneously. When just damp, it is ironed out

flat with a not over-heated iron. Black tones can be obtained with a

platinum toning bath, or with the uranium and gold toning bath, made

up as follows: Gold chloride, 1 part; uranium nitrate, 1 part.

Dissolved and neutralized with sodium carbonate, and then added to

sodium chloride, 16 parts; sodium acetate, 16 parts; sodium phosphate,

16 parts; distilled water, 4,000 parts.

Very effective results may be made by printing with wide white

margins, obtained by exposing with a non-actinic mask.

Another method is the following: Ammonium chloride, 100 grains;

Iceland moss, 60 grains; water (boiling), 20 ounces.

When nearly cold this is filtered, and the silk immersed in it for

about fifteen minutes. To sensitize, immerse the silk in a 20 grain

solution of silver nitrate for about sixteen minutes. The silver

solution should be rather acid.

Or immerse the silk in water, 1 ounce; sodium chloride, 5 grains;

gelatine, 5 grains. When dry, float for thirty seconds on a 50 grain

solution of silver nitrate. Dry, slightly overprint and tone in the

following bath: Gold chloride, 4 grains; sodium acetate, 2 drachms;

water, 29 ounces. Keep twenty-four hours before using. Fix for twenty

minutes in hypo, 4 ounces to the pint of water.

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