रूप्यस्य द्वौ भागावेकः शुल्बस्य त्रिपुटकम् ॥ कZ_०२.१४.२० ॥
rūpyasya dvau bhāgāvekaḥ śulbasya tripuṭakam
For silver: two parts (silver) to one part copper—this is called tripuṭaka.
The state defines measurable purity thresholds, enabling testing, taxation, and punishment for debasement.