| abstract |
A contrast dye for preparing a lithographic printing plate comprising at least one A, D and B group wherein A represents a phosphorous containing group capable of reacting with the surface of a lithographic receiver; D represents a chromophore group absorbing light between 400 and 700 nm; and B represents an aliphatic group of at least 6 carbon atoms. A lithographic printing plate comprising such a contrast dye is also disclosed. |