click below
click below
Normal Size Small Size show me how
Core Skills E
Key Materials Used on Press (Ink Application)
Question | Answer |
---|---|
What decade were water-based inks first tested and what was the application? | In the 1930's on paper and paperboard. |
What are the major components of UV inks? | Monomers, oligomers and photo initiators |
Just as solvent balance in solvent inks governs print performance, the alkalinity or the amount of alkali present in a water-based ink determines its performance.The amount of alkali present is measured using a pH meter. Descibe the chemical term for pH. | pH is a chemical term that is a measure of acidity or alkalinity and is associated with water-based inks. |
Radiation-cured inks first appeared in the 1970's. UV and EB systems using such inks, which a re stable and compatible with the environment, are employed to speed operations and reduce solvent emissions. What is meant by stable? | UV inks have no solvents or amines to evaporate from the ink. |
With all anilox rolls volumetric carrying capacity should be determined by the depth-to-opening ratio to obtain clean ink receptivity and ink release form the anilox cells.What range is recommended optimum depth-to-opening ratio, how is volume measured? | 23-33% and volume is measured in billion cubic microns. |
In your own words define "process inks". | A set of inks for high reproduction illustrations by halftone color separation process, colors are yellow, magenta, cyan with or without a skeleton black. |
In your own words explain the difference between solvent and water based inks. | The chemistry is very similar but solvent inks do not use water amine to dry the inks, rather they use different blends of solvent. |
How do water and solvent based inks dry? | Both ink systems dry by admixture of heat and air. |
What are the two main types of colorants available to the industry? | Pigments and Dyes. |