Separation Preserving Colors
In a digital printing system, a separation-maintaining color (additional color) is a color that is to be used as a spot color in the printout. Examples would be White, Varnish or Ferrari Red. Whilst White and Varnish must always be marked as maintaining separation, Ferrari Red could also be used as process colour. If the color is created as a process color, this color is taken into account as a gamma-expanding color in the color management; separation-preserving colors, on the other hand, are not color-calculated but are added as an additional color to the color management.
A Subtractive Color model involves the mixing of a limited set of dyes, inks, paint pigments or natural colorants to create a wider range ofcolors, each the result of partially or completely subtracting (that is, absorbing) some wavelengths of light and not others. The color that a surface displays depends on which parts of the visible spectrum are not absorbed and therefore remain visible.
The sheet is the area available for Imposing print items. The sheet is typically defined by the the width and height as well as the edge dimensions. Sheets typically are Imposed with a Motif to optimize the print process and reduce waste. Sheet Margins usually contain Inprints which are blocks of information usually related to the printing process and/or finishing instructions.
A Substrate is used in a converting process such as printing or coating to generally describe the base material onto which, e.g. images, will be printed. Base materials may include:
- plastic films or foils
- release liner (for adhesive labels)
- plastic containers
- any variety of paper (lightweight, heavyweight, coated, uncoated, paperboard, cardboard, etc.)