White photographic paper support and method of producing same

US4396671A · kind A · utility

Assignee

• Felix Schoeller GmbH & Co. KG · DE

Inventors

• Rudolph Wanka · Osnabrück, DE
• Heinz Wilke · Bad Salzdetfurth, DE
• Wolfram Wysk · Belm, DE
• Uwe Jensen · Osnabrück, DE

Key dates

• Filing date: Jun 25, 1981
• Grant date: Aug 2, 1983
• Expiry date: Jun 25, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31902
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A photographic support material includes a base paper upon which a polyolefin coating is coated on at least one side. The coating includes titanium dioxide therein and at least one alkaline earth metal oxide in an amount of about 0.05-20% by weight of the coating, preferably calcium and/or magnesium oxide, and/or an alkaline earth metal carbonate in an amount of about 0.05-10% by weight of the coating, preferably calcium and/or magnesium carbonate.