I have a half used plastic bag of Sprint Speed Fixer and it has developed a white precipitate in it. It is generally stored at about 55 deg F and has most of the air removed as I use it. Is the precipitate fixer coming out of solution or a decomposition by product? and if the latter...what is the chemistry of the decomposition or reaction leading to the precipitate. Hypo should oxidize to a sulfate and thus be quite soluble. Anyway Mees?s book did not tell me much about the hypo itself.

Bob

5:24:29 PM    

"robert/pat poor" wrote: > ....Some landscape pros use only a Linhof....I am thinking to the fellow in > Colorado who does two week hikes in the mountains taking 4x5 color slides [and > publishes beautiful books....rats I can not recall his name.....] packing the > Linhof....he did the huge William Henry Jackson reshoot book for the Col. Hist > Soc in 98 or 99 (the reshoot book was done > with the type camera and lenses Jackson had used in the late 1800s I believe).

That would be John Fielder. He uses the Master Technika as does John Sexton. Fielder's LowePro pack weighs in at 65 lbs and includes 400 sheets of Velvia, or did when he made the Rocky Mountain National Park book. (I ran into him on the Timber Lake Trail on the west side leading his "sherpas" by several minutes while he was making the photographs for the book. His pack was nearly as big as he is.) Sexton uses an old converted Kelty rucksack with everything in its own padded box. I guess its less obvious.

Dick Dykinga (sp?) also uses the Master Technika. But then there is me in the back of the line still using my old Technika II with gaffer's tape and toothpicks to hold it together and keep it steady.

Peace! Sidney

-- God said, Let there be light! Divine Light: Photography by Rev. Sidney Flack 2332 W. Newton Tulsa, OK 74127 http://www.divinelightphotography.com

5:23:29 PM