Some photographers prefer substituting the cyan emulsion in the CMYK separations with a cyanotype layer. Some processes do not have emulsions, such as platinum, cyanotype, salted paper, or kallitype. The cyanotype was invented by Sir John Herschel in 1842. Over 12,000 cyanotype prints were produced and presented in chronological order. Andres created a series of cyanotype photographs which can be seen on her website. Sometimes cyanotype and heliographic (sun printing) are used. Kallitype images generally have a richer tonal range than the cyanotype. The cyanotype process, for example, produces an image composed of blue tones. He invented the cyanotype process, later familiar as the "blueprint". The compound has widespread use in blueprint drawing and in photography (Cyanotype process). This has been the main change in cyanotype process since its inception. The process is also known as cyanotype. Makoto has since quit the band to join Cyanotype. Cyanotype, also referred to as "blueprinting", is the oldest non-silver photographic printing process. Cyanotype photography was popular in Victorian England, but became less popular as photography improved.