Richard mentioned this book a few times: 'Photographic Facts and Formulas'. I was lucky enough to get a copy of the 1975 edition on Amazon for a song. Good book!
On page 156, it lists a nameless formula of a hypo test for film, apparently far more sensitive than Kodak's HT-1a, which is listed on the previous page.
mercuric chloride 25 g potassium bromide 25 g water to make 1000 mlThe book goes on to explain that it was suggested by Crabtree and Ross (big names) and gives a detailed description of its application.
Has anybody ever used this? Why does it not have a name? Is it a best- kept secret because of its first ingredient?
Regards Ralph W. Lambrecht http://www.darkroomagic.comThis electronic message contains information that is confidential, legally privileged or otherwise protected from disclosure. This information is intended for the use of the addressee only. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, printing or any other use of, or any action in reliance on, the contents of this electronic message is strictly prohibited. If you have received this communication in error, please notify the sender and destroy the original message immediately.
P don't print this e-mail unless you really have to
