शुल्बं तारं वा गर्भः पत्त्राणां संघात्येषु क्रियते ॥ कZ_०२.१४.३० ॥
śulbaṃ tāraṃ vā garbhaḥ pattrāṇāṃ saṃghāṭyeṣu kriyate
Sa mga pinagsiksik na nilaminate ng dahon, ang tanso o kawad ang ginagawang ‘sinapupunan/ubod’ (garbha) sa loob (ibig sabihin, base metal ang loob at dahon ang panlabas).
Placing a cheaper metal core (copper/wire) inside a laminated leaf structure so the outside looks precious while the inside is not.
Assaying must test interior composition (cut tests, drilling, density checks), not only surface appearance.