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.
Read more about this topic: Paper And Ink Testing
Famous quotes containing the word trap:
“The little lifting helplessness, the queer
Whimper-whine; whose unridiculous
Lost softness softly makes a trap for us.
And makes a curse.”
—Gwendolyn Brooks (b. 1917)
“And boys, be in nothing so moderate as in love of man, a clever
servant, insufferable master.
There is the trap that catches noblest spirits, that
caught—they say—God, when he walked on earth.”
—Robinson Jeffers (1887–1962)
“All Coolidge had to do in 1924 was to keep his mean trap shut, to be elected. All Harding had to do in 1920 was repeat “Avoid foreign entanglements.” All Hoover had to do in 1928 was to endorse Coolidge. All Roosevelt had to do in 1932 was to point to Hoover.”
—Robert E. Sherwood (1896–1955)