There are several types of varnishes used on metal containers, and their choice depends on the specific use and requirements of the container. Some of the most common varnishes are:
- White base varnish: This varnish is applied on lithographed containers and acts as a base coat to protect the metal surface. It also improves the adhesion of printing inks.
- Finishing varnish: This varnish is applied over the printing on lithographic packaging to protect it, since the inks have little resistance to abrasion. The finishing varnish is always transparent.
- Outer varnish: This varnish is used on containers without printing and with low tin coating. Protects the metal surface from external corrosion. It is usually colorless, but can sometimes be golden.
In general, these exterior coatings belong to the vinyl, acrylic or epoxy-phenolic families. Varnishes used in contact with food must comply with FDA (Food and Drugs Administration) regulations or other similar bodies in Europe.
When choosing the right varnish for a metal container, it is important to take into account the type of product to be packaged, the storage and transport conditions, and the regulations applicable in your region.
Properties of a varnish for metal containers
detachment of varnish on the tinplate
Metal Containers | 4L Metal Containers
metal container with white varnish coating
Metal Containers | 4L Metal Containers
can metal containers be heated in the microwave?
Physical resistance of metal containers
Metal food containers
DETERMINATION OF THE WEIGHT DRY FILM OF VARNISH
DECORATION OF CONTAINERS
