If the grey component is replaced by black ink, the same color is being achieved by using two primaries and black. The substitution of black for the grey component is described as grey component replacement (GCR).

ISO printing condition: ISO DIS 15339-2, CGATS.21-2. Printing process definition: Any CMYK process such as: offset, screen, inkjet, flexo, toner, gravure, dye-sublimation. Characterization data. Reference Name: CGATS21-2-CRPC6. Target data: …

Gray Component Replacement (GCR)is the separation technique to replace cyan, magenta and yellow wherever they overprint to produce neutral gray. This process is also known as achromatic color separation .

All registered profiles correspond to a standard printing condition and a publicly available characterization data set. Note that more than one profile may be generated from a data set, using different separation methods such as the level of black generation.

May 3, 2011 · This kind of color replacement is called Gray Component Replacement (GCR). If the color range affected by this replacement is limited to dark, near-neutral colors, then it is called Under Color Removal (UCR).

Feb 6, 2005 · UCR and GCR are the two standard black generation stratigies used for CMYK printing. UCR stands for Under Color Removal. UCR separations use the K ink only for neutral or near-neutral colors.

The advantages of the use of GCR include: Ink savings (black ink is less costly than CMY inks, and GCR enables less ink to be used overall), Color stability (Printing is less susceptible to color changes and shifts.)

Nov 1, 2017 · Gray component replacement (GCR) and undercolor removal (UCR) are color reproduction considerations for the printing press. UCR and GCR determines how much cyan, magenta, and yellow are replaced with black within a CMYK image.

May 12, 2007 · Gray Component Replacement, abbreviated GCR, is a technique for replacing gray tones otherwise made from yellow, cyan and magenta separations instead with black ink. Advantages of GCR include: Black ink can be less costly than CMY inks.

All the GCR-profiles have a very strong GCR in the neutral axis and a medium GCR in the more saturated colors for a good and stable grey balance in standardised printing. The ICC profiles which are geared to the naming of the ISO profiles published by the European Color Initiative (ECI) have a similar black separation.