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Printability with Flexo Gravure inks
Paper

Whatever the type of paper or cardboard, printability with these inks is good.
Coated papers and machine glazed papers allow better quality prints to be obtained.
Synthetic substrates

The surface must not be soiled with impurities, grease, waxes, oils, etc. One of the essential conditions is that the surface energy must be at a sufficient level to obtain good printability and, in particular, good adhesion.
Low and high density polyethylene films and bi-oriented and co-extruded polypropylene films must have treated surface energy levels of 38 to 40 dynes/cm. Polyester (PET) can be treated up to 45 dynes/cm.
Films that have received a top coating or pre-lacquering treatment (common in Gravure / Flexo) must be printed with inks that are compatible with these treatments (e.g.: cellulosic prelacquering / cellulosic inks or acrylic pre-lacquering / cellulosic inks).
Metallised and metallic substrates

Thin aluminium used on its own, or in a complex, must always undergo a prelacquering
treatment (cellulosic or acrylic). Pre-lacquering is not always essential when thicker aluminium, such as that used in the manufacture of bottle top capsules, is printed.
Vacuum metallised films have a very fragile surface and, to improve their printability, we recommend that they are pre-lacquered

Good printability requires perfect compatibility between the ink and the substrate. Our laboratories would be pleased to help you with any printability studies you may require on your substrates and to recommend the most suitable ink for each type of substrate.
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