While most photograms are made with standard black and white photographic paper, the Photogram is a process that lends itself to experimenting and in terms of materials, the limiting factor is only one's imagination.

Alternative photographic processes or hand made emulsions:

While alternative processes like cyanotype, Van Dyke Brown, gum bichromate etc. are accessible and popular there are a wide range that can be used to make photograms. Albumen prints, Platinum/Palladium, salt prints, Daguerreotype etc. can also be used.

They require a good knowledge of photography and chemistry as often the chemicals have to mixed from scratch and applied onto a support base like paper. This can be a fine printmaking paper, but it can also include textiles, wood, and a range of other materials.

Many of these processes require exposure to full sunlight for as long as 20 min's and the direction of the light can vary during this time, altering the shadows of taller objects. It has an advantage in that the emulsion does not have to cover the entire surface of the base and can be applied to form a motif.	Cyanotype photogram
	Van Dyke Brown Chich'e Verre photogram
Children making simple cyanotype photograms at a workshop I ran in Blacon France in 2007

I used both the Van Dyke Brown process and the Cyanotype for the Aporian Emulsions project.