Recording sheet with improved image waterfastness, surface strength, and runnability

This invention describes a special coating applied to paper to make it more durable and perform better. The coating helps the paper resist water damage, makes its surface stronger against wear and tear, and improves how smoothly it runs through printing machines. The claims specifically cover compositions that may include pigments or organic salts to achieve these improvements.

Why it matters: Filed in 2008, this invention predates significant advancements in sustainable and bio-based polymer chemistry. New, more cost-effective or environmentally friendly starch derivatives and macromolecular compounds could now make such a coating more viable or enhance its performance beyond what was achievable then.

Status: ExpiredProtection ended and was never renewed
How hard to build: ModerateChemical formulation, paper coating machinery

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