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What is letterpress printing?

2018-08-30

1,What is letterpress printing?


The printing using the relief is called relief printing, which is referred to as letterpress printing.


In the current letterpress printing, the ink supply device of the printing machine first distributes the ink evenly, and then transfers the ink to the printing plate through the ink roller. The raised surface is obviously higher than the non-image portion, so the ink can only be transferred to the raised surface of the plate, while the non-image part has no ink. The paper feeding mechanism conveys the paper to the printing member, and under the action of the printing pressure, the ink of the printed raised surface is transferred to the receiving object, thereby creates an impression on the paper.


The process of letterpress printing consists of several stages: composition, imposition and lock-up, and printing.

Letterpress Label Printing Machin

2, The modern letterpress, and the UV rotary letterpress

the modern letterpress printing called rotary letterpress printing used for high-speed work and the mass production. And the printing quality achieved by a modern letterpress machine with UV curing is on par with flexo presses. UV inks for letterpress are in paste form, the ink is thicker and fuller (the thickness of the ink layer is about 7um), unlike the solvent-washed inks of flexo printing. It is more convenient and user friendly than a flexo press.


3, Application

The invention of ultra-violet curing inks has helped keep the rotary letterpress printing, alive in wide scale areas like self-adhesive labels, non-self-adhesive labels, tube laminate, cup stock trademarks, packaging and decoration printing, newspaper printing, significant advantages especially on the film labels.


Various manufacturers produce UV rotary letterpress machines, as lingtie (Xiamen) Machinery Co.,Ltd which is a famous known-well printing corporation in China, and offer hot/cold foil stamping, rotary die cutting, flatbed die cutting, sheeting, rotary screen printing, adhesive side printing, and inkjet numbering.


Central impression presses are more popular than inline presses due to their ease of registration and simple design. Printing of up to nine colors plus varnish is possible with various online converting processes. We believe the further of the letterpress label printing machine.

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