EP 0127787 A2 19841212 - Hydrolyzable diffusion control layers in photographic products.
Title (en)
Hydrolyzable diffusion control layers in photographic products.
Title (de)
Hydrolisierbare Verzögerungsschichten in photographischen Produkten.
Title (fr)
Produits photographiques comprenant des couches de contrÔle de la diffusion hydrolysables.
Publication
Application
Priority
US 49301383 A 19830509
Abstract (en)
Photographic diffusion transfer film units including polymeric diffusion control layers are disclosed. The diffusion control layers comprise polymers which are hydrolyzable in an alkaline medium so as to convert a layer comprising one or more of the polymers from a condition of impermeability to alkali or materials soluble in or solubilized by an aqueous alkaline processing composition to a condition of substantial permeability thereto.
IPC 1-7
IPC 8 full level
CPC (source: EP)
G03C 8/54 (2013.01)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0127787 A2 19841212; EP 0127787 A3 19860611; EP 0127787 B1 19890315; AU 2776984 A 19841115; AU 558979 B2 19870219; CA 1219759 A 19870331; DE 3477275 D1 19890420; JP H0379702 B2 19911219; JP S59212836 A 19841201
DOCDB simple family (application)
EP 84105057 A 19840504; AU 2776984 A 19840508; CA 452993 A 19840427; DE 3477275 T 19840504; JP 9170784 A 19840508