Method of preparing a carrier material for photography
AssigneeFelix Schoeller, Jr.
InventorWalter von Meer
Life of this patent
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Abstract
This invention relates to a carrier material for photographic purposes which is formed of paper coated with a synthetic resin. The paper contains a water soluble inorganic salt that enhances its drying by microwaves. In a preferred embodiment, the paper contains starch.
Claims18
Sheet material comprising a paper core, an aqueous layer applied on both sides of the paper core including a mixture having in combination therein 0.25 to 5 grams of starch or starch derivative and 20 to 30 mVal of NaCl or KCl per square meter as an aqueous solution containing starch, said sheet material during drying being enhanced by microwave radiation and whereafter a layer of synthetic resin is coated onto said applied aqueous layer.
A method of preparing and drying a sheet material comprising:
- applying onto both sides of a paper core an aqueous layer including a mixture having in combination therein 0.25 to 5 grams of starch or starch derivative and 2 to 30 mVal of NaCl or KCl per square meter as an aqueous solution containing starch, enhancing the sheet by microwave radiation during drying and thereafter coating the sheet upon each side thereof with a layer of synthetic resin disposed upon said applied aqueous layer.
Dependencies are inferred from the claim text.