| |
|
Inventor: Qualitz; Marion
Address: Hilden, DE
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4379721 |
Pressure sensitive recording materials |
April 12, 1983 |
| The present invention relates to a pressure-sensitive recording material ing improved storability, lightfastness and heat resistance, which comprises a unit containing a dye precursor or its solution and a unit containing a dye acceptor material which is capable of color formation by |
|
|
|
