समरागलेखमनिम्नोन्नते देशे निकषितम् परिमृदितं परिलीढं नखान्तराद्वा गैरिकेणावचूर्णितमुपधिं विद्यात् ॥ कZ_०२.१३.१८ ॥
samarāgalekham animnonnate deśe nikaṣitam parimṛditaṃ parilīḍhaṃ nakhāntarād vā gairikeṇāvacūrṇitam upadhiṃ vidyāt
筋が一様な色に見えても、—凸でも凹でもない箇所で試すと—にじんで汚れたり、引きずられて消えたり、爪の溝に掻き入れられたり、黄土(オーカー)様の粉化が現れるなら、それは混ぜ物・偽り(upadhi)と知るべきである。
To control the test environment: uneven surfaces can distort the streak and create false positives/negatives in adjudicating fraud.
It operationalizes enforcement: officers can justify seizure/penalty using observable criteria rather than discretionary opinion.