letterset printing

NOUN
18 LETTERS · STARTS WITH L

letterset printing is a valid 18-letter word worth 20 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
L1E1T1T1E1R1S1E1T1P3R1I1N1T1I1N1G2
1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 2 =20 PTS
DOUBLE WORD → 40TRIPLE WORD → 60
MEANING

What does letterset printing mean?

NOUN · 1 SENSE
1

Image is transferred from a relief type plate to a roller.