Lines per inch

What is the proper l.p.i. for polymer plates ?

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LPI is only needed if you are doing halftones. Photopolymer plates can achieve 200 lpi under ideal conditions. Letterpress is not an ideal condition. It depends upon a number of factors; press, ink and viscosity, packing, impression, plates, bases, skill set.

The best you could get with letterpress is 150 lpi and it is not recommended. This piece was done at 150 lpi despite the engravers admonition.

on a thick smooth surfaced dampened mouldmade paper but it took some doing.

Halftones don’t really have an affinity for letterpress.


Thank you Gerald,
will do some experiments at 45-85-100. Got to get the a 220 plug and some polymer plates first.