EDWARD J JOHNSON, JR
Broker in Arlington, MA
License number
Massachusetts 77475
Issued Date
Apr 1, 1972
Expiration Date
Jul 31, 1976
Type
Broker
Address
Address
Arlington, MA 02474
Professional information
Mordanting Substrates And Agents
US Patent:
6093447, Jul 25, 2000
Filed:
Jul 18, 1997
Appl. No.:
8/910577
Inventors:
Edward J. Johnson - Arlington MA
Donald R. Allred - Westford MA
Donald R. Allred - Westford MA
Assignee:
Iris Graphics, Inc. - Bedford MA
International Classification:
B41J 201, B05D 504
US Classification:
427146
Abstract:
A mordanting substrate is provided including a porous substrate, and, distributed within the substrate, a mordanting agent. Preferably, the substrate is a fibrous cellulosic material, and the mordanting agent is a cationic polymer that is soluble in polar solvents, preferably water-soluble. The polar solvent solubility of the polymer, in combination with the porosity and cellulosic nature of the material, has been found to cause the mordanting agent, when imbibed into the substrate in the form of a solution, to bind to fibers within the substrate. This binding in turn allows excellent immobilization of dye within the substrate.