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Stamp Ink for Marking Defects On Glass Masters

IP.com Disclosure Number: IPCOM000119369D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 22K

Publishing Venue

IBM

Related People

Ajster, R: AUTHOR

Abstract

This article describes a stamp ink for marking defects on a glass master.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Stamp Ink for Marking Defects On Glass Masters

      This article describes a stamp ink for marking defects on
a glass master.

      The ink consists of a solution of a wax chalk (such as PELIKAN*
red wax chalk) in ISOPAR G** and is used in automatic phototool
inspection systems to mark defects that have been detected.

      This ink can be readily produced at any time by the operator
dissolving a piece of red wax chalk in an adquate amount of ISOPAR G.

      The quality of the stamp ink mark is much better than that of
currently available stamp inks.  Additionally, there is no danger of
retouched areas, already existing on the glass master, being etched.
On the other hand, the mark can be easily removed, as the ink solvent
and the cleaning agent for the glass master are in most cases
identical.
*    Trademark of Pelikan-Werke.
**   Trademark of Exxon Chemical.