Paper and Ink Testing - Trap

Trap

Trap is a measure of the ability of a wet ink film printed on the paper to accept the next ink printed on top of it. Preucil’s formula is used to measure trap. % Trap = {(Density of overprint – Density of 1st ink)/Density of 2nd ink} x 100

Trap affects the colour values of the secondary colours, and plays a major role in defining the color gamut of a press. Poor trap leads to colour shift in the secondary colours. Trap is also affected by the ink tack, viscosity, ink film thickness and the impression pressure.

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Famous quotes containing the word trap:

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    Gwendolyn Brooks (b. 1917)

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    Robinson Jeffers (1887–1962)