Other Gravure Presses
Gravure engraved cylinders are used to apply primers, coatings and adhesives on overall or spot coating to a wide variety of products. Examples are:• Primer coating, to facilitate adhesion of ink on foil.
• Coatings or primers to provide barrier properties.
• Cold seal adhesives.
• Adhesive coating for dry bond lamination.
• Registered spot adhesive.
• Heat seal coatings.
• Coatings for hot stamp foils.
• Release lacquers.
• Hot melt coatings.
In all the cases above, the coating unit is a standard gravure unit. For hot melt (wax) coating, a gravure system is also used but it is slightly modified because the pan, the coating cylinder and the doctor blade are generally heated. Coating materials, although supplied to the coating cylinder from the ink fountain, are generally not supplied to the ink pan through the press's conventional ink circulation. Physical properties of the coating will determine how the material is brought into contact with the engraved cylinder.
Gravure Units on Other Equipment. Gravure units may be installed in line with other equipment, mainly in line with flexo or offset print units, as well as laminating equipment. Generally, the scope of the gravure unit is to apply an overall lacquer or lamination adhesive.
Gravure units are also installed in line with extrusion coating or extrusion laminating lines.
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