An alternative (non-silver) photographic process is loosely defined as any traditional or historic analog (although I don’t like the term analog) printing process that does not use silver gelatin paper that is commonly used in traditional darkroom printing. There are many alternative processes such as platinum, cyanotype, vandyke, gum bichromate, kallitype, ziatype and salt printing to to name just a few, but the list goes on and on.
http://non-silver.com/platinum-palladium/a-world-of-alternat...

Non-silver and historic processes are general terms that refer to various photographic processes that do not contain silver in its emulsion or were popular around the turn of the 20th century. Invented during the latter half of the 19th century, these older processes include collodion wet-plate, van dyke brown, gum-bichromate, and cyanotype, among others. Each requires mixing and coating the emulsion by hand. Hence, the resulting images have a painterly quality, an effect often left from the brushstrokes in painting the emulsion and the small inconsistencies and inaccuracies that result from hand processing.
http://www.reframingphotography.com/content/non-silver-histo...

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Another frequently used term in this context is:
historic photographic processes/techniques

Proposition

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Gum bichromate is a 19th-century photographic printing process based on the light sensitivity of dichromates. It is capable of rendering painterly images from photographic negatives. Gum printing is traditionally a multi-layered printing process, but satisfactory results may be obtained from a single pass. Any color can be used for gum printing, so natural-color photographs are also possible by using this technique in layers.
http://en.wikipedia.org/wiki/Gum_bichromate

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Szlachetne techniki fotograficzne – techniki graficzne oparte na wykorzystaniu światłoczułości i garbujących właściwości chromianów, a także innych związków światłoczułych, ale też tradycyjnej fotografii jako materiału wyjściowego.
Od technik stricte graficznych odróżnia je niepowtarzalność procesu technologicznego, prowadzącego z reguły do otrzymania pojedynczej, wyjątkowej odbitki/obrazu. Od standardowych technik fotograficznych (analogowych) odróżnia je zarówno niepowtarzalność, jak i wykorzystanie materiałów innych niż światłoczułe sole srebra. Obecnie przeżywają renesans jako przeciwwaga dla zalewu fotografii cyfrowej

Opiera się na zmniejszeniu rozpuszczalności gumy arabskiej (uczulonej dwuchromianem amonu lub potasu) pod wpływem światła. Arkusz papieru (przeklejonego – najczęściej żelatyną, odpornego na wodę, często z wyraźną, ziarnistą fakturą) pokrywa się zawiesiną kryjącego pigmentu w roztworze gumy arabskiej z dodatkiem dwuchromianu amonu lub potasu i ew. amoniaku.
http://en.wikipedia.org/wiki/Gum_bichromate
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http://pl.wikipedia.org/wiki/Szlachetne_techniki_fotograficz...

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Pictures
https://www.google.com/search?q=gum bichromate photography&e...

Fogografie
https://www.google.com/search?q=szlachetne techniki fotograf...
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Introduction. Gum Bichromate photography is another form of alternative photography similar to Van Dyke and Cyanotype, only much more involved.
http://www.sewanee.edu/Chem/Chem&Art/Detail_Pages/Projects_2...
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gum bichromate process
noun
a contact printing method in which the image is formed on a coating of sensitized gum containing a suitable colored pigment and potassium or ammonium dichromate.

http://dictionary.reference.com/browse/gum bichromate proces...


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Pins about Gum Bichromate Photography inspiration hand-picked by Pinner Krafty Arts

http://www.pinterest.com/kraftyarts/gum-bichromate-photograp...

Od standardowych technik fotograficznych (analogowych) odróżnia je zarówno niepowtarzalność, jak i wykorzystanie materiałów innych niż światłoczułe sole srebra. Obecnie przeżywają renesans jako przeciwwaga dla zalewu fotografii cyfrowej

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As chemical (classical) photography is increasingly replaced with digital photographic technology, there is a danger that this shift will trigger a decrease in scientific research and knowledge regarding chemical photography. - http://www.getty.edu/conservation/our_projects/science/photo...

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Those who are interested in individually oriented creation find even greater possibilities in historical photographic processes than in classical photography

If we look abroad, we find that ‘alternative’ photographic techniques are steadily gaining in popularity. These are in fact revived historical techniques dating from the beginnings of photography.

http://www.ntm.cz/projekty/fototechniky/en/

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The classic tintype process - http://www.alternativephotography.com/wp/processes/wetplate/...


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