Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1981-02-13
1983-05-31
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430220, 430222, 430223, 430523, 430524, 430559, 430561, G03C 148
Patent
active
043861490
ABSTRACT:
A photographic dye diffusion transfer process is provided which operates by imagwise release of a dye.
The dye diffuses to a receiving layer and is mordanted there to give a dye image. The dyes are released from a compound of the formula D--E--F--BAL by reductive cleavage.
D is a group which contains the residue of diffusible dye, BAL is a ballasting group which renders the compound containing it substantive to the layer in which it is present, D and E being joined by any type of chemical bond and E and F represent a single or double bond system which links D and BAL and which has a reduction potential above -200 mV measured against a standard hydrogen electrode at a pH of less than 3 and which bond can be reductively cleaved at a pH of less than 3 by a reducing agent which is able to act as a pH below 3.
REFERENCES:
patent: 3227552 (1966-01-01), Whitmore
patent: 3330655 (1967-07-01), Salminen
patent: 3585028 (1971-06-01), Stephens
patent: 3617275 (1971-11-01), Bloom et al.
patent: 3628952 (1971-12-01), Puschel et al.
patent: 4168976 (1979-09-01), Campbell et al.
patent: 4269928 (1981-05-01), Mason et al.
patent: 4271254 (1981-06-01), Mason et al.
Kitzing Rainer
Long William E.
Mason Leslie F. A.
Reeves David L. R.
Whitear Brian R. D.
Brown J. Travis
Ciba-Geigy AG
Kolodny Joseph G.
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