bichromate were added to keep the prints clean, and to increase contrasts ; after development, they were immersed in a solution of
Rochelle salts ............ 10 parts.
Water ............... ioo ..
and then in
Water ............... 80 parts.
Ammonia ............... 1 part.
and subsequently washed and dried.
Kammatograph. See Cinematograph.
Kaolin. Synonym: China Clay. A very fine hydrous silicate of alumina, containing about 14 per cent, of water. It is a decomposition product from natural decay of felspar. It was used in the wet process as a purifier of the silver bath.
Kata-Positive. A term occasionally used to distinguish a positive on an opaque base from a diapositive or transparency.
Kinetoscope, Kinematograph. See Zoetrope.
Kite Photography. M. Batut has obtained photographs by means of a small camera attached to a kite; his arrangements being described in his book La Photographie Aerienne par Cerf-Volant, published by Messrs. Gauthier-Villars, of Paris.
Kodak. A name applied by the Eastman Company to their hand-cameras.
Kromskop, Kromogram. Mr. Ives's Kromskop is a device for seeing simultaneously the system of three transparencies (this triplet being called the Kromogram), each transparency being backed by a screen of suitable tint. (See Photography n Natural Colours.)
Lac. A hard resin resulting from a morbid vegetable growth, and largely imported from India. The brown lac occurs in scales (shellac) and nodular masses (button lac), and should be used in all cases where its colour is not prohibitive, as the com-mercial bleached lac is often very much deteriorated. When bleached lac is used it should be obtained quite fresh. When old and easily brittle it is valueless. (See Varnish.)