Information and discussion on all aspects of British photographic history
John Harrison's Discussions (3)
| Discussions Replied To (3) | Replies | Latest Activity |
|---|---|---|
"I would have thought Niepce. Once the unhardened Bitumen of Judea had been removed a…"John Harrison replied Sep 5, 2017 to The first person to make a fixable photograph |
9 |
May 29 Reply by Alex Novak |
"The classic ferricyanide bleach is Farmer's Reducer, a solution of Potassium Ferricy…"John Harrison replied Dec 22, 2013 to Retouching techniques |
6 |
Dec 22, 2013 Reply by John Harrison |
"The more powerful bleach is Potassium Ferricyanide. (not ferro). An iodine solution…"John Harrison replied Dec 22, 2013 to Retouching techniques |
6 |
Dec 22, 2013 Reply by John Harrison |
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