terence_spross1 Posted March 22, 2007 Share Posted March 22, 2007 Curiosity, While I can eat a hamburger without guilt, I was talking to a person from Indiawho was appauled to find that film had gelatin (derived from animals) in it. Hisreligion did not allow for consumption, in any context, of animals. That got meto wonder if any films color or B&W ever had a non-animal based emulsion. I amaware that some films have a reduced amount of gelatin, with the addition ofvarious polymers mixed in, but I don't know of any emulsion without gelatin. I know the pharmacutical industry uses a lot of gelatin for pill capsules, andhas an alternative that is not used very much due to patent issues. (I wonder ifthis is percieved by many in India as a problem?) Link to comment Share on other sites More sharing options...
helenbach Posted March 22, 2007 Share Posted March 22, 2007 <a href="http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00EgOX">Here is a previous thread about the subject.</a><p> Link to comment Share on other sites More sharing options...
robert lee Posted March 22, 2007 Share Posted March 22, 2007 Shoot digital. No animal parts in any of my DSLR's (gremlins don't count.) Link to comment Share on other sites More sharing options...
randrew1 Posted March 22, 2007 Share Posted March 22, 2007 Guessing the a person from India is likely Hindu, it is not all animals they object to. Cows are sacred to Hindus. Most of the gelatin in photographic film is from cattle bones. There was a time when much of it came from the bones of sacred cows in India. After the cows died their bones would be gathered by untouchables. Partly for political reasons and partly for quality control reasons, gelatin makers switched to US slaughterhouses for their cattle bones. Today there are import restrictions on cattle bones because of mad cow concerns. Some layers in color films use gel made from pig skins. I know of experiments with fish gel. Link to comment Share on other sites More sharing options...
gene_e._mccluney Posted March 23, 2007 Share Posted March 23, 2007 It's called collodion. The "wet-plate" process, where you coat a glass plate with a solution of salted collodion and immerse in a silver nitrate sensitizing bath for a period of time, then take the plate immediately to the camera and expose it while the plate is still wet, and then immediately develop it. Can produce almost grain-free images, but only sensitive to the blue end of the light spectrum. This was the process used by many of the most highly respected photographers of the 19th century. Names such as Matthew Brady, etc. Since collodion is made from cotton fibres and an acid, there are no animal products in it. Link to comment Share on other sites More sharing options...
randrew1 Posted March 24, 2007 Share Posted March 24, 2007 Another non-gelatin (but not animal free) media is albumin prints. People like Mathew Brady and Timothy O'Sullivan captured their images with wet plate collodion and printed on sensitized albumin paper. I've heard of albumin paper still available as print-out paper (requiring no development). Link to comment Share on other sites More sharing options...
profhlynnjones Posted March 28, 2007 Share Posted March 28, 2007 There was a b/w print film that was processed by hot water! When boiled, microscopic nitrogen bubbles in the plastic would create an image that was really quite good. Aren't you glad that I gave you that great piece of trivia. Lynn Link to comment Share on other sites More sharing options...
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