Art of producing changes in the characteristics of composition

摘要

469,091. Colour photography. COLORAY CORPORATION. Oct. 11, 1935, No. 28122. Void. Convention date, Oct. 23, 1934. [Class 98 (ii)] Organic fibrous material such as artificial silk, silk, wool, or cotton is treated with an organic solution of a salt of a radioactive metal, such as uranium, thorium or radium, and a salt of a non-radioactive metal, and is treated by ultra-violet light having wavelengths from 1700-3200 A.U. to obtain a colour change. In colour photography, cellulose, celluloid or viscose bases are treated with the following sensitizing solutions. A solution for producing a red colour comprises uranium nitrate, ferric ammonium oxalate, citric acid, lactic acid, glycerine, ethyl alcohol, and alloxan. A solution for producing a yellow colour comprises uranium nitrate, ferric ammonium citrate, citric acid, lactic acid, glycerine, ethyl alcohol, and silver lactate or nitrate. A solution for producing a blue colour comprises potassium ferrocyanide or ferricyanide, uranium nitrate, lactic acid, glycerine, ethyl alcohol, and ferric ammonium citrate or oxalate. The colour may be produced on the surface or in the body of the base. Three colour component negatives are printed by light of wavelength below 4000 A.U., on to the three elements, which are then washed, dried and superimposed. The process may be applied to two-colour photography. The material is insensitive to daylight. Gold and platinum may replace the silver, cobalt or nickel wholly or in part the iron, and sodium or lithium the potassium. Salts of calcium, barium, strontium manganese, chromium and magnesium may be added. The alloxan may be replaced by a vanadium salt or copper sulphate. The metals may be employed as nitrates, chlorides, oxalates, lactates or sulphates, or in colloidal form. Silver, tin, copper, zinc and mercury may be made into an amalgam, and uranium or uranium nitrate and lactic acid added, and the mixture used as sensitive material. Silver lactate may be replaced by silver carbonate and lactic acid, or silver nitrate, sodium carbonate and lactic acid. Acids used in the preparation of the sensitive materials may be also glycollic, malic, tartaric or hydrochloric acids. The ultra-violet ray source may be a quartz mercury vapour lamp or a quartz lamp containing mercury vapour, helium, and argon.