Tinplate is thinly rolled steel, up to 0,49 mm thickness, on which there is a coating of tin. This layer of tin, of approx. 2g m², is very thin and protects against corrosion.
Tinplate printing is the print process for the basic material of tinplate. The offset lithographic printing system is used. The tinplate is usually covered completely with a white lacquer, then followed with halftone printing in the 4 colour set or with special colours. The final design is finished with a colourless protection lacquer (varnish) in order to protect it against scratches during the production process and final use. Printing takes place, on machines with up to six printing stations / colours. In addition to oil based inks we increasingly use UV inks.
A plate, or sheet, cut from a coil, is the format mostly chosen. This ensures as little waste as possible when tins are produced. Multiple impressions – according to the tin size – are printed and cut from one sheet.
An elevated or recessed (debossing) impression in the surface of the metal, either for labeling (in the case of packaging for dangerous goods) or to enhance the design (in the case of decorative tins).
The lid of the tin is fixed onto the body with a hinge. This can be either a wired hinge or a sheet hinge which is formed out of the lid and/or the body
The slip lid is a separate lid which is not fixed to the body of the tin.