ernally each spot color is assigned a spot color number.  These
numbers start with 0 for the first spot color.  The spot color
numbers are assigned in the same order as the names are printed to
stderr (see below).  This order also matches the ordering in the
SeparationColorNames list, if this parameter is specified.  The
spot color numbers are not affected by the SeparationOrder parameter.

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The names of spot colors may be specified via the SeparationColorNames device
parameters.  Or the tiffsep device w