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Coating Evaluation: A Comprehensive Analysis of Physical, Processing, Resistance, and Hygiene Characteristics
Coating testing is categorized into four types: physical performance, processing performance, resistance, and hygiene indicators.
(1)Physical Performance:Solid content, viscosity, relative density, cleanliness, color, flowability, and particle size of the coating.
(2)Processing Performance:Gloss, adhesion, slipperiness, scratch resistance, extensibility, and impact resistance of the coating film.
(3)Resistance:Acid resistance, sulfur resistance, high-temperature resistance, and corrosion resistance.
(4)Hygiene Indicators:
Apart from physical performance, all other tests must satisfy the following three conditions:
(1)Appropriate Substrate:
(2)Correct Film Thickness:
(3)Complete Curing:
When determining if a coating is suitable for a specific type of food, reliance solely on the results of coating tests is insufficient. Instead, practical canning trials should be the determining factor.