- Joined
- Jan 20, 2007
- Messages
- 105
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- 35mm Pan
Hi all, I tumbled to 2 papers from Jacqueline Belloni
Radiation Physics and Chemistry, 67:291 Photography:
enhancing sensitivity by silver-halide crystal doping
The paper describe the use of HCO2- (10e-6 Mol / 1 AgBr Mol)
to cover holes and increase film sensitivity (by over 5 times)
It is also in nature: Belloni, J., Tréguer, M., Remita, H. and
de Keyzer, R., 1999. Enhanced yield of photoinduced electrons
in doped silver halide crystals. Nature 402, pp. 865–867.
I've read the 1st one, pretty interesting. If you cant access
these journals, you can email me in narigas-2006 AT bol DOT
com DOT br (no spaces, just to avoid spam...) cheers
The methodology was sold to Agfa (...)
... at the relative concentration of
10−6 mol HCO2−per mol Ag+,...
How do I measure pAg? I would like to be able to do that.Kodak measures pAg or vAg as it is more accurate, and is more indicative of the actual conditions
It is generally measured using a conductivity meter and silver or silver halide plated electrodes.
The biggest problem is not building a meter setup, it is the calculations involved in calibrating it. Someday I may publish a table on this. It is incredibly complex.
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