Autotype
a method of phototyping. Tissue, being prepared with a liquid composed of gelatine, sugar, and bichromate of potash, is then used for taking a collodion negative in the ordinary way. It is next applied under water with the face down to a plate of glass, metal, or other paper, coated with gelatine and chrome alum. Means are then taken to remove the parts not hardened by light, and, finally, by another elaborate process, the plate is made ready for the printingpress.