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3. Varnish application
There are two essential phases in achieving the desired result:
application: apply the liquid varnish to the metal;
baking: to give the varnish film its final structure.
3.1 Application techniques
They are summarized in the table at 4 .
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Basic technique
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Varnish application
Valuation methods
Economic data
For France, the values are as follows:
— cans for preserves and beverages 7 billion cans/year
— metal used 600,000 tonnes/year
— varnishes and coatings 25,000 tonnes/year
Bibliography
Regulations
As materials intended to come into contact with foodstuffs, varnishes must comply with the relevant regulatory requirements.
At present, we mainly take into account :
european regulations ;
French texts ;
American regulations.
European regulations
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Organization
Center technique de la conservation des produits agricoles, CTCPA.
Manufacturers
Metal packaging manufacturers
Crown Cork/Carnaud metal box
Férembal
Impress Metal Packaging SA
Massilly France
Continental Can France
Nacanco SA
Varnish manufacturers
Holden Europe
PPG Industries Packaging Coatings
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