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A Separation space whose colorant is named All paints every plate, and one named None paints nothing (ISO 32000-1:2008, 8.6.6.4). EPS export wrote a spot swatch's name as its colorant, so a spot color named All printed on every plate and one named None did not print. Such an ink is now written as All Spot or None Spot, numbered All Spot 2 and on when a spot swatch already has that name, in its Separation space, DeviceN spaces and the %%DocumentCustomColors and %%CMYKCustomColor comments. At PostScript Level 3, a gradient that mixes one of these inks with another spot ink or with process or gray stops is now a DeviceN shading instead of process colors. Registration still writes All.