detachment of varnish on the tinplate

Varnish flaking on tinplate can be caused by several factors, such as varnish quality, surface preparation and storage conditions. Below, I provide you with detailed information on some of the possible reasons for the flaking of varnish on tinplate:

1. Surface preparation: The surface of the tinplate must be clean and free of oils, greases, oxides and other contaminants before applying the varnish. If the surface is not well prepared, there may be a poor adhesion of the varnish, which may cause its detachment. Surface cleaning can be performed by chemical or mechanical processes, such as the use of solvents, detergents or abrasives.
   
2. Varnish quality: The quality of the varnish is crucial to ensure good adhesion to the tinplate. A varnish of poor quality or unsuitable for the specific application may not adhere properly to the surface, which can lead to peeling problems. It is important to select a suitable and high quality varnish to avoid these problems.
   
3. Storage conditions: Storage conditions of varnished tinplate may affect the adhesion of the varnish. Exposure to moisture, direct sunlight or extreme temperatures may weaken the adhesion of the varnish to the tinplate. It is important to store varnished tinplate in a cool, dry place protected from direct sunlight to maintain the quality of the varnish.
   
4. Varnish application: Incorrect application of the varnish, such as inadequate coating thickness or poor distribution of the varnish, can cause adhesion problems and, consequently, detachment. It is important to follow the varnish manufacturer’s recommendations for application and curing to ensure good adhesion.
   
5. Interaction with other materials: The interaction of the varnish with other materials, such as printing inks or adhesives, may affect the adhesion of the varnish to the tinplate. It is important to make sure that the materials used are compatible with the varnish to avoid problems of detachment.
   
   In summary, to avoid flaking of varnish on tinplate, it is essential to ensure that the surface is well prepared, use a high quality varnish, store the varnished tinplate in proper conditions and follow the manufacturer’s recommendations regarding application and curing of the varnish.

Recommendations to avoid porosity inside a container Differences between tinplate and tfs VARNISH HOMOLOGATION THE AGREED EUROPEAN ALTERNATIVE FOR THE PASSIVATION OF ELECTROLYTIC TINPLATE IS CFPA RELATIONSHIP BETWEEN SURFACE ROUGHNESS AND COATING QUALITY CHARACTERISTICS OF THE ELECTROSTATIC SEWING POWDER EXTERNAL CORROSION IN CANNED FOOD CONTAINERS INTERIOR VARNISH LOAD IN ELECTRIC WELDING DETERMINATION OF THE WEIGHT DRY FILM OF VARNISH FACTORS AFFECTING VARNISHING OF THE TIN