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Ensuring good quality colour reproductions requires regular
calibration of all components in the system. However, this is not
sufficient without proper characterisation and control of the
printing press. It is a fundamental tenet of pre-press calibration
that colour transforms be defined by the press characterisation and
sufficient control be implemented to maintain consistent output
using these transformations. Calibration may, therefore, be thought
of as a 6 stage process:
a) Stabilise and control the printing process. (This is
increasingly becoming "standardised" via specifications such
as SWOP)
b) Characterise the press by printing and measuring suitable
test images
C) Match the proofing system to the press (for both soft and
hard copy proofs)
d) Stabilise (linearise) input scanners and output recorders
e) Define the transformation required to produce high quality
reproduct ions
f) Control scanners and recorders to maintain the transform
Procedures are discussed which may be used to achieve this
calibration process and tools which have recently been developed to
assist in this are described.
Tony Johnson
"Calibration of colour pre-press systems", Proc. SPIE 1670, Color Hard Copy and Graphic Arts, (1 May 1992); https://doi.org/10.1117/12.2322234
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Tony Johnson, "Calibration of colour pre-press systems," Proc. SPIE 1670, Color Hard Copy and Graphic Arts, (1 May 1992); https://doi.org/10.1117/12.2322234