Environmentally friendly fountain solution for wet offset printing process and wet offset printing process
AssigneeSicpa Holding SA
InventorsCecile LEPRINCE, Leslie JADAS, Adrian FRIEDLI
Life of this patent
Estimating the term…
Abstract
The present invention relates to the field of environmentally friendly fountain solutions for wet offset printing processes based on oxidative drying inks. In particular, the invention related to the field of wet offset printing processes for producing security features on security documents. The present invention provides a process for producing a security feature by a wet offset printing process, said process being carried out by using a fountain solution comprising one or more manganese (II) salts of a C1-C3 carboxylic acid as well as the fountain solution and its concentrate.
Claims20
A process for printing a security feature on a substrate by a wet offset printing process comprising the steps of:
- a) wetting a printing plate with a fountain solution comprising one or more manganese (II) salts of a C1-C3 carboxylic acid,
- b) inking the printing plate with an oxidative drying ink, and
- c) transferring the oxidative drying ink from the printing plate in an offset printing machine to a substrate so as to print a security feature on the substrate.
A fountain solution suitable for a wet offset printing process, the fountain solution comprising one or more manganese (II) salts of a C1-C3 carboxylic acid, wherein the fountain solution has a pH of 4 to 6, and wherein the pH is adjusted by a buffer.
Dependencies are inferred from the claim text.