I read somewhere azo vibrates with light. I only saw one cut piece of ilfochrome and depth , smoothness and pearl luster were matchless. Thinking today , may be this luster caused by micro azo vibration ?
Is it possible ?
The azo dyes used in the Ilfochrome process do not vibrate, at least in the visible spectrum. They do absorb certain portions of the visible spectrum and reflect the other portions. It is the light photons that have specific vibrational frequencies. Certainly all the vibrations are much faster than the eye could perceive as luster.
The appeal of the Ciba/Ilford color paper was that it was a dye destruction process. This allowed the use of more stable dyes than can be formed in typical dye creation processes used by other films and papers. I know that this sounds rather strange but the dyes created using couplers in the emulsion are very sensitive to fading and environment pollutants. The dye destruction process also allows for a wider choice of dyes enabling a better overlap between the dyes forming the primary colors in the paper. The major downside of the process was due to the slow speed of the paper. Since all the dyes are present before exposure there is quite a bit of self masking reducing the paper speed. Then too is the difficulty with the positive to positive process rather than the conventional negative to process one.
I am confused by the term f Azo. To a chemist the term azo applies to a certain group of nitrogen containing compounds. These compounds can be represented by R-N=N-R' where R and R' are any organic groups.
Any vibrations associated with dyes are far too rapid to be felt as a physical vibration.
The surface effects on Ciba/Ilford color papers were not achieved by the vibration of the dye. These effects were built into the paper either chemically or mechanically. If they were a function of the dyes, then the effects would vary imagewise.
I read somewhere azo vibrates with light. I only saw one cut piece of ilfochrome and depth , smoothness and pearl luster were matchless. Thinking today , may be this luster caused by micro azo vibration ?
Is it possible ?
A small point, but an important one for clarification. The smoothness and lustre were indeed without match, but Ilfochrome Classic media was never furnished in "pearl lustre". It was always referred to either as gloss or super high gloss finish.
I have no idea what this "micro azo vibration" thing is about!
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