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Mucilage mixed with water has been used as a glue, especially for bonding paper items such as labels, postage stamps, and envelope flaps. [7] Differing types and varying strengths of mucilage can also be used for other adhesive applications, including gluing labels to metal cans, wood to china, and leather to pasteboard. [ 8 ]
Agfacolor. Ap-41 process (pre-1978 Agfa color slides; 1978-1983 was a transition period when Agfa slowly changed their color slide films from AP-41 to E6); Anthotype; Autochrome Lumière, 1903
The first involved printing a light photographic positive on salted paper using a toned or bleached negative to lower the contrast. The other, producing what is generally referred to as a “crayon enlargement”, [ 2 ] [ 3 ] was to use a magic lantern to project the photograph onto the rear of drawing paper or a canvas. [ 4 ]
Unfortunately, the paper products produced and used during the late-19th and early-20th centuries are highly acidic and will cause yellowing, brittling and degradation of hand-coloured photographs. Metallic inclusions in the paper can also oxidize which may be the cause of foxing in paper materials. Wood panel slats will also off-gas causing ...
This cell wall is used to produce everyday products such as timber, paper, and natural fabrics, including cotton. [ 7 ] Root mucilage is a part of a wider secrete from plant roots known as root exudate.
Cyanotype, also referred to as "blueprinting", is the oldest non-silver photographic printing process. [1] It involves exposing materials which have been treated with a solution of potassium ferricyanide and ferric ammonium citrate to a UV light source such as the sun.
Standard digital processes include the pigment print, and digital laser exposures on traditional color photographic paper. [citation needed] Alternative processes often overlap with historical, or non-silver processes. Most of these processes were invented over 100 years ago and were used by early photographers. [2] [3]
Photographic emulsion is a light-sensitive colloid used in film-based photography. Most commonly, in silver-gelatin photography, it consists of silver halide crystals dispersed in gelatin. The emulsion is usually coated onto a substrate of glass, films (of cellulose nitrate, cellulose acetate or polyester), paper, or fabric.