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n.1.A photographic picture taken upon paper prepared by the use of a sensitive salt of iron and developed by the application of chloride of gold.
2.2process, invented by Sir J.Herschel.
References in periodicals archive ?
In 1842, astronomer Sir John Herschel invented the chrysotype, which produces images in collodial gold, as well as the more popular cyanotype process, which results in brilliant blue images.
By this point Herschel had developed another photographic process - the Chrysotype - which used ammoniocitrate of iron which dried into a yellow colour before receiving a photographic image.