The default number of Type 0 sample values to generate when
converting from a Type 2 to a Type 0 function.
When a colorspace that uses a Type 2 function is converted to a
new colorspace, that new colorspace is sampled to create a
replacement Type 0 function. Many times the default number of
samples is adequate, but occasionally one needs more samples to
eliminate the subtle banding effect encountered during shades,