![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhHDHYn8ENZc49qfzZjgoUjYWDOIZV-uyZZW2vw08yr-n3JzLntWGjLQQrzztSC-j5Ixc0X7wGPSYcbvtRkqX7cuHzFZ35XsovdOggNwA1Z9hRfNaZBAq52s4FVujgQLlXsMnyz6_pL8lI/s400/Gum-bichromate+4.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirZuNV3E_XW2yaljlyhIYoHoEIzMGBAmwFQsk0DDJ8M8ckU3C0NDJpTj0e71HNDfMBCj7nzKvJvpM11M1qD8WTy9kLsFawt-JSyb0QRp0gAsqIocJfDef1mtxfoySmvTxuKxWw4YwgENY/s400/Gum-bichromate+1.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjy5MCoLsB841eSHEhpB_h7tAFUQlsLulCQ7PKiiN-qFEQS7bjNKzl8tWvJ7O4z5ls7dwu9g88OPWrhvJnVAnnR1JkKXWu-VPIPhNZ_nJHHU6dnf2uUhAjRaW6ZWt1tmaxdiADRLG9O3dA/s400/Gum-bichromate+2.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkVv-GDmL4xrt98W3nwCB0QEJiXiWSujgnx6P678f4AvrPFe9SaJGrY8AhjYmEDfDZJug6-u4m6_HRvJ5wvcYzWTpxXxS6N4wtXzkYAAG31cQwOVn80QKPIT-VxXb9ah1GoXzjUJONfFM/s400/Gum-bichromate+3.jpg)
Robert Demachy prints
Mine
Two items for the aficionado of photography: An old photographic, non-silver, printing process text and a classic photography book. Except for the wealthy and knowledgeable, the old photographic processes [bromoil, carbon, cyanotype, ferro-gallic, gum-bichromate] are nearly extinct. They required great skill and patience...not characteristic of today's digital photography. Books on the old processes are scarce but a classic written by Robert Demachy who specialized in gum-bichromates is available online. Photo-aquatint, or, The Gum-bichromate Process: A Practical Treatise on a New Process of Printing in Pigment Especially Suitable for Pictorial Workers by Robert Demachy
And a detailed general photography text by C. B. Neblette that covers the studio, cameras, darkroom, and motion picture.
1952 edition...
Photography Its Materials And Processes by C. B. Neblette
Robert Demachy [Wikipedia]
Gum-bichromate [Wikipedia]
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