कालपर्वतकं रक्तकालमनवद्यवर्णं वा ॥ कZ_०२.११.५१ ॥
kālaparvatakaṃ raktakālamanavadyavarṇaṃ vā
‘Kālaparvataka’ is red-black, or else of flawless color.
It creates a reject/accept threshold—goods failing visible-quality benchmarks can be refused, repriced, or penalized in supplier settlements.