Calibration mark	Description
CAL_2-tone.pdf	Two adjacent square swatches, one 50% of the first spot color and the other solid
CAL_2-tone_6-color_Long.pdf	An arrangement of two-tone swatches in a horizontal line of the first six colors in the job. It can be easily concealed inside a long, narrow flap.
CAL_2-tone_6-color_Stack.pdf	An arrangement of two-tone swatches in a vertical line of six colors. It can be easily concealed inside a short, wide flap.
CAL_Bleeder Bar.pdf	Uses the first color in the job. Color combinations of this mark are used for identifying packages.
CAL_CMYK Gray Tones.pdf	Two squares containing the text "25 CMYK" and "75 CMYK" in four-color builds, screened at those percentages. When the inks are balanced properly on the press, the text blends into the backgrounds of 25% and 75% black. These targets are also found in the color bars.
CAL_Quadtone.pdf	25%, 50%, 75%, and 100% squares of the first spot color in the job. In the absence of a full color bar, gives ample information for the press. It is often found in multiple colors, stacked on a flap.
CAL_Quadtone_6-color.pdf	25%, 50%, 75%, and 100% squares of each of the first six colors in the job. Used on jobs that need minimal color control, and have limited space.
CAL_Scale_Wide_Tonal.pdf	Uses the first color in the job. Samples tones in increments of 5%, plus 2% and 98%.
CAL_Spot.pdf	Uses the first spot color in the job. Solid, filled circle useful for measuring ink coverage on press.
CAL_Spots_4-color.pdf	Uses the first four colors in the job. Four solid, filled circles useful for measuring ink coverage on press.