In the case of composite colour, an infinity of systems must be obtained for maxima infinitely slight and with an infinity of interval values separating them - that is to say, the whole thickness of the sensitive layer is occupied…
Quote by Gabriel Lippmann
Gabriel Lippmann Quotes
I got quite good results from protein plates.
The problem of direct colour photography has been facing us since the turn of the...
The length of exposure (one minute in sunlight) is still too long for the portrait....
The plate at each point only sends back to the eye the simple colour imprinted....
Life is short and progress is slow.
This result is due to a phenomenon of interference which occurs within the sensitive layer.
When the shot is afterwards subjected to white light, colour appears because of selective reflection.
The series of photographic operations, developing, washing, final drying, takes about quarter of an hour.
Most of these pictures, taken while travelling, were developed on the mantelpiece of a hotel...
During exposure, interference takes place between the incident rays and those reflected by the mirror,...