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HARDENERS FOR PHOTOGRAPHIC GELATIN - MITSUBISHI PAPE…
- https://www.freepatentsonline.com/3868257.html#:~:text=A%20gelatin-silver%20halide%20photographic%20emulsion%20for%20use%20in,weight%20of%20gelatin%20based%20on%20the%20dry%20weight.
- none
US5073480A - Quick acting hardener for photographic …
- https://patents.google.com/patent/US5073480A/en
- Quick acting hardener for photographic gelatin layers Download PDF Info Publication number US5073480A. US5073480A US07/551,030 US55103090A US5073480A US 5073480 A US5073480 A US 5073480A US 55103090 A US55103090 A US 55103090A US 5073480 A US5073480 A US 5073480A Authority US United States Prior art keywords substituted unsubstituted
US3868257A - Hardeners for photographic gelatin
- https://patents.google.com/patent/US3868257A/en
- gelatin compounds hardener emulsion hardeners Prior art date 1971-12-30 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor Shoichi Horii Shoji Yamada Kiyoshi ...
HARDENERS FOR PHOTOGRAPHIC GELATIN - MITSUBISHI …
- https://www.freepatentsonline.com/3868257.html
- A gelatin-silver halide photographic emulsion for use in color photography containing a coupler and as a hardener therein a compound having the general formula: ##SPC7## 4. A composition according to claim 1, wherein the amount of the hardener is 0.1 - 20 percent by weight of gelatin based on the dry weight.
hardener for gelatine sizing | Photrio.com Photography …
- https://www.photrio.com/forum/threads/hardener-for-gelatine-sizing.114443/
- 35mm. May 29, 2014. #2. gel hardener. 37% formaldehyde (25ml per 1000ml distilled water ) is prob easiest to get, unless you can find some mercuric chloride (be careful, serious stuff) better results than alum, more even . The real voyage of discovery consists not in seeking new landscapes, but in having new eyes.
Gelatin Silver Process | Learn the Gelatin Silver Print …
- https://customcollagen.com/history-photographic-gelatin/
- The gelatin photography process was created in the 19th century and is known as the gelatin silver process. The early gelatin silver process involved coating paper or film in a gelatin emulsion, which was a mixture of gelatin and salt. The process was refined as time went on into the four-layer structure still used in traditional photography today.
US Patent for Method of hardening gelatin and …
- https://patents.justia.com/patent/4173481
- The gelatin hardener of the present invention may be used in the photographic light-sensitive materials in combination with a matting agent. Examples of matting agents which may be used include particles of water-insoluble organic or inorganic compounds, with an average particle size of about 0.2.mu. to about 10.mu., preferably 0.3 to 5.mu..
Photographic light-sensitive material containing gelatin hardener ...
- https://www.freepatentsonline.com/4828974.html
- A photographic light-sensitive material containing a novel gelatin hardener is disclosed, which comprises as a gelatin hardener at least one compound represented by formula (I) ##STR1## wherein R 1 and R 2 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group, or R 1 and R 2 …
Gelatin as a Photosensitive Material - PMC
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6222838/
- Gelatin or gelatine is an important functional biopolymer widely used in foods to improve elasticity, consistency and stability. It is also used in pharmaceutical drugs, vitamin capsules, photography and cosmetic industry. Gelatin is a protein made by the thermal denaturation of collagen. It is a colorless or slightly yellow substance.
The silver gelatin dry plate process
- https://www.alternativephotography.com/silver-gelatin-dry-plate-process/
- B. Sprinkle 3.5g. of gelatin onto surface of 236ml. (1 cup) of distilled water. Let this stand for 10-15 minutes so that the gelatin can swell up. Then heat up the mixture until the gelatin is dissolved. Pour contents into a third container that is specified for photographic use only.
Hardeners, how do they work? | Photo.net Photography Forums
- https://www.photo.net/discuss/threads/hardeners-how-do-they-work.20181/
- The hardener hardens the gelatin improving its ability to cope with rough handling during washing. The usual hardening agent in fixing ... photographic gelatin at the National Archives of Canada, the literature said that the isoelectric point was around a pH of 5.1. I don't remember which paper that came from,
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