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3. Paint film formation
The formation of paint or varnish films follows different mechanisms, depending on whether the product is air-cured or oven-cured, but it is the result of the paint's transition from a liquid to a solid state.
Air drying at room temperature or oven drying (40 to 80 ˚C): oxidation drying (oxidopolymerization), polyaddition drying, physical drying, ultraviolet radiation drying ;
Kiln drying: polycondensation drying, polyaddition drying.
3.1 Air drying
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Paint film formation
Main properties of paint films
Bibliography
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In Engineering Techniques
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Paint standardization
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Different types of standards exist:
national standards specific to each country (AFNOR in France, ASTM in the United States, DIN in Germany, BSI in Great Britain);
international standards of worldwide scope, set up by ISO but whose use is not mandatory in individual countries;
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Regulatory aspects
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Paints
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Paints for food contact
All items likely to come into contact with foodstuffs must meet inertness requirements so as not to impart any taste to the food or allow any of their constituents to migrate.
The regulations take up these requirements by setting out the list of substances authorized...
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