gum bichromate printing on gold leaf
gum printing
gum print on gold and white gold leaf
gum printing with genuine pigments
gum print on gold leaf. Panel wood
alternatine photography with canon rangefinder
gum print on gold leaf. Panel wood
gum print with genuine pigments
alternative photography
gum bichromate print
gum bichromate print
gum bichromate printing process
gum bichromate print on panel wood
gum bichromate print on gold, white gold. On wood
gum bichromate print with gold and lapis lazuli
gum bichromate print on gold, white gold. On wood
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Jacek Wasko is fine art conservator, painter and photographer . Born in Poland in 1960. Lives and works in London .
Member of the Polish Visual Artists' Association /ZPAP/
The processes that he develops are gum bichromate and oil printing.
Gum bichromate
This 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.
Gum bichromate, or gum dichromate as it is also known, is a photographic printing process invented in the early days of photography when, in 1839, Mungo Ponton discovered that dichromates are light sensitive. William Henry Fox Talbot later found that colloids such as gelatin and gum arabic became insoluble in water after exposure to light. Alphonse Poitevin added carbon pigment to the colloids in 1855, creating the first carbon print. In 1858, John Pouncy used colored pigment with gum arabic to create the first color images.
Gum prints tend to be multi-layered images sometimes combined with other alternative process printing methods such as cyanotype and platinotype. A heavy weight cotton watercolor or printmaking paper that can withstand repeated and extended soakings is best. Each layer of pigment is individually coated, registered, exposed and washed. Separation negatives of cyan, magenta, and yellow or red, green, and blue are used for a full-color image. Some photographers prefer substituting the cyan emulsion in the CMYK separations with a cyanotype layer. A simple duotone separation combining orange watercolor pigment and a cyanotype can yield surprisingly beautiful results.
Low density photographic negatives of the same size as the final image are used for exposing the print. No enlarger is used, but instead, a contact printing frame or vacuum exposure frame is used with an ultraviolet light source such as a mercury vapor lamp, a common fluorescent black light, or the sun. The negative is sandwiched between the prepared paper and a sheet of glass in registration with previous passes.
The print is then floated face down in a bath of room-temperature water to allow the soluble gum, excess dichromate, and pigment to wash away. Several changes of water bath are necessary to clear the print. Afterwards, the print is hung to dry. When all layers are complete and dry, a clearing bath of sodium metabisulfite is used to extract any remaining dichromate so the print will be archival.
info from wikipedia.org
https://en.wikipedia.org/wiki/Gum_bichromate
Gumoil printing
Gumoil printing is the method for producing photos with gum, chromium salts and oil paints. Through the use of materials for art works - cotton paper and oil paints, archival photos have unique properties that are comparable to paintings on canvas. Gumoil print is the alternative photographic process.
Gumoil prints, such as the one adjacent to this paragraph, were so named by Karl Koenig in his first book published in 1994 by Focal Press. The term is a composite of Oil Pigments and Gum Arabic (mixed with potassium bichromate for its UV sensitivity) . Using photographic positives Gumoil is a versatile, but labor intensive process which can yield painterly images on cold press paper or more photographic results if hot press paper is used. No two prints are ever truly identical and when numbered in a series they are captioned as “edition variable.”
http://www.gumoil.com/
Gum printing
gum oil printing
gum print on gold, white gold and lapis lazuli - five layers
wood panel
gum print on gold, white gold and genuine vermilion - five layers
wood panel
gum print on gold, white gold and genuine malacite - five layers
wood panel
gum print on gold, white gold - five layers
wood panel
gum print on gold, white gold, lapis lazuli and eeg tempera- seven layers
wood panel
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gum oil print
on paper
gum oil print
on paper
gum oil print
on paper
gum oil print
on paper
gum oil print
on paper
gum oil print
on paper
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gum prints on wood panel
gum prints on paper
gum oil prints