Are used to control screen percentages for printing and proofing. Usually varying shades of CMYK, from 0% - 100%, located on signature or press sheet.
A strip of varying shades usually ranging from 0% to 100% (in 10% increments) on film, proofs, and press sheets. Prepress service providers use calibration bars to measure and control screen percentages for printing and proofing.
A strip of tones printed on paper or film and used for quality control.
A strip of tones used to check colour quality, you will find it on the proofs, printing plates or printed job
On a negative, proof, or printed piece, a strip of tones used to check printing quality.
Used on a negative, proof, or along the edge of the printed web. A strip of tones enabling print quality to be checked.
On a negative, proof, or printed piece, a strip of colour/tonal values used to check quality.