White photographic paper support and method of producing same
AssigneeFelix Schoeller, Jr. GmbH & Co. KG
InventorsRudolph Wanka, Heinz Wilke, Wolfram Wysk, Uwe Jensen
Life of this patent
Estimating the term…
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.
Claims17
Photographic support material comprising:
- a base paper;
- at least one polyolefin coating on at least one side of said paper;
- said coating including titanium dioxide therein and at least one material selected from the group consisting of an alkaline earth metal oxide and mixtures thereof in an amount of about 0.05 to 20% by weight of said coating.
A method of making a photographic material comprising coating base paper with a polyolefin coating by extruding said coating through a fishtail die, said polyolefin coating including titanium dioxide therein and at least one material selected from the group consisting of an alkaline earth metal oxide and mixtures thereof in an amount of about 0.05 to 20% by weight of said coating.
Dependencies are inferred from the claim text.