Application processes

The technique of spraying a varnish is obtained by separating a liquid into fine particles which are transported by air or nitrogen onto the surface of an object. This spray-coating technique is very widely found, and affords great flexibility in function whilst coping with variously-shaped pieces. 

It is varnishing in 3D par excellence. If high viscosity is an issue for a varnish with 100 % dry substance content, it is possible to use high-pressure pumps to replace the action of the compressed air.

The technique of coating is generally used for films being rolled out. An engraved cylinder is wetted using the varnish, which fills the engraved pits. The film is kept pressed against the engraved cylinder which, as it turns, empties its pits onto the film. This continuous process allows for
homogeneous layers of UV varnish a few microns thick over the film, whilst boosting specific properties.

This process uses a flat screen with a calibrated mesh. Parts of the screen are blocked in, to prevent the ink from passing through, while others are open. It then becomes possible to draw shapes or texts which will be reproduced onto the plates (plastic, metallic, cardboard, sheets of paper, etc.) with an ink which will pass across the screen. We formulate specific inks for this process.

In outline, and in the reverse of the previous process, the image to be reproduced is stuck on a cylinder. The ink is applied by another cylinder, which comes into contact with the image. The transfer of the ink onto the image is rapid, allowing for production which is close to printing.