How to Spot Doctor Blade Lines Before the Entire Roll Is Scrapped
Doctor blade lines are thin lines that run in the web direction and cut through the pattern, slightly darker or lighter than their surroundings. Once they appea...
Articles by Editorial Team
What Does a Hickey Look Like, and When Should You Stop the Press?
A hickey is a printed speck with a white ring, made by a particle on the plate or blanket. Stop when that mark repeats in the same place, or when it sits on a b...
How Much Misregistration Should a Label Press Allow?
Hold colour-to-colour register near 0.25 mm, and print-to-die near 0.5 mm, on an ordinary narrow-web label. Tighten both when a border, a small label or a regul...
How Tight Should a Delta E Tolerance Be on Press?
Match the tolerance to the reference, not to a single house number. ISO 12647-2:2013 allows an offset OK sheet within ΔEab 5 of the aim, and at least 68% of the...
What Is Print Quality Inspection? A Plain-Language Overview
Print quality inspection is the process of checking printed output against a reference to find defects such as colour drift, misregistration, spots and missing...