Business Partner : GM Metal Packaging

HOW ARE TINS MADE?

Tin boxes are made from tinplate that is steel electro plated with a layer of tin, this makes the tin a printable surface with a bright finish.

Tinplate is supplied either on a coil and cut into sheets or is supplied in sheets.

The tin is then printed using conventional ink printing, the printing is flexo where we have a roller that picks up the ink and applies this to the tinplate, after each pass of the printing pass which can have either 2 or 4 stations the tinplate is then heated in an oven to “bake” the inks on to the tin plate.

The maximum number of colours that can be printed is 4 colour process and 4 pantone colours.

The minimum number of sheets that can be printed at any one time is 3,000 sheets.

Once the design or designs have been printed a final lacquer is applied to the tinplate and this is what can come into contact with food stuffs/products. This is tested against food migration testing etc…

The flat printed tinplate is then guillotined from the sheet and stacked ready for production.

The flat printed plate is then formed into the tin shapes using a variety of different machine tools including stamping and seaming machinery.

After the tins have been made they are cleaned and packed into cartons to be shipped around the world.

English breakfast tea tin - Tinworks metal tin in tinplate and aluminium
The tins can be filled from the top or the bottom depending on your requirements
To keep the tin air tight the seam is welded together
We can apply a base with compound or a ring pull with a valve to the lid

Direct fill coffee tins

We manufacture air tight direct fill coffee tins.

These tins are printed in the same way as normal tins, except that we need to leave an undecorated and lacquer free edge to each design -these edges are then welded together to form a “tube”.

Our customers can fill the tins from the top or bottom, we can apply a base with compound or a ring pull lid. We also can supply a gas release valve.

M&S cafe ground coffee tin 1 - Tinworks metal tin in tinplate and aluminium
A ring pull is seamed onto the tin either in a vacuum or nitrogen atmosphere.
The edges are then welded together to form a “tube”.
We apply a compound in the base of the tin and seam this to the body