There are several methods of printing photographs on fabrics. The simplest is the platinotype, as the material - silk, satin, linen, calico, etc. - is supplied sensitised and ready for use by the Platinotype Co. It is treated in the same way as paper, being printed to the required depth and developed by immersion in a saturated solution of oxalate of potash or in the D salts supplied by the company. It is fixed by immersion in one or two baths of hydrochloric acid - strength 1 in 60 - and merely requires half an hour's washing in running water. A very permanent image which will stand washing may thus be produced. The prepared material is somewhat costly, therefore the following plan may be preferred. Procure some pure silk - not treated with acetate of lead - and immerse for two or three minutes in a salting solution prepared as follows: Boil 2 dr. of arrowroot in a little water and dissolve and add 75gr. of chloride of ammonium and make up to 32 oz. of water and filter. When the silk is dry, a sensitising solution of silver nitrate 40gr., citric acid 1 1/2 gr., water l oz. is brushed over it, the fabric being pinned flat on a board.

Print as usual, but very deeply, and tone with water 5 oz., sodium acetate 7 gr., chloride of gold 3igr. Allow this bath to mature for twenty-four hours before using it. Very pleasing results are obtained by merely fixing without toning. Well wash before toning, and place in a bath of common salt and water before fixing in hyposulphite of soda 2oz., water lpt. The pictures may be coloured with crayons and a very beautiful effect produced. The crayons may be fixed by spraying with a solution of rubber in benzole. The picture, if not coloured, may be washed in cold running water. By the " Primuline " process prints on a yellow ground may easily be obtained in red, scarlet, crimson, maroon, orange, brown, etc., by sensitising with primuline and treating after exposure with a developer. In printing fabrics, great care must be taken when examining the print lest the material should be stretched, when a blurred and distorted image will result. Gauge the exposure by experience, or use an actinometer, when the material may be stretched on a light frame. Absolute contact must, however, be assured.

The grain of the material must not be too marked or a coarse effect will result.