AlternativePhotography.com have two new how-tos up, one each for woodburytype and ziatype printing.
"Woodburytype images are made by pouring a translucent mixture of pigments suspended in warm gelatin onto a relief surface, then transferring this pigment layer onto paper. In this case, the thick and thin areas of gelatin, along with the white of the paper produce a wide range of beautiful tones. I state that the tones are beautiful because the thickness and translucency of the pigment layer provides a remarkable kind of color that a conventional flat deposit of ink cannot achieve…"
Continue reading the woodburytype how-to at AlternativePhotography.com
"The ziatype is a variation of the Pizzighelli POP process that uses lithium palladium chloride (lithium chloropallidite) as the primary metal and ammonium ferric oxalate for the iron compound to produce a continuous tone print. Color and contrast are controlled chemically, unlike other Pizzighelli processes where color and contrast are controlled by humidity…"
Continue reading the ziatype how-to at AlternativePhotography.com
(POP is Printing Out Paper, where the image becomes visible as it is exposed, as opposed to the standard Developing Out Paper, which is exposed and then needs to be bathed in liquid developer before the image becomes visible.)