[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Minerals and Metals in Ancient India](https://indike.org/pramana/ins.science.biswas-1996) › v2.c44.s2.3 # Minerals and Metals in Ancient India v2.c44.s2.3 Minerals and Metals in Ancient India v2.c44.s2.3 - **Language:** English ### [v2.c44.s2.3](https://indike.org/pramana/ins.science.biswas-1996.v2.c44.s2.3) tin, lead and copper may be cleaned by alkali and acid water whereas iron and \*kāmsya\*, copper alloy (could it mean brass also as suggested by Roy, 1946:108? Brass was mentioned as \*riti\* by Caraka and Manu) should be cleaned by ash and water. Yājñavalkya advised the kings to use copper plates to write deeds (\*Ācāra\*, 318-320). - [Previous: v2.c44.s2.2](https://indike.org/pramana/ins.science.biswas-1996.v2.c44.s2.2) - [Next: v2.c44.s2.4](https://indike.org/pramana/ins.science.biswas-1996.v2.c44.s2.4) - [Up: v2.c44.s2](https://indike.org/pramana/ins.science.biswas-1996.v2.c44.s2) ## Cites (2) - [Carakasaṃhitā](https://indike.org/pramana/in.med.samhita.caraka) — Agniveśa (Āyurveda) & Caraka, Sanskrit - [Yājñavalkyasmṛti](https://indike.org/pramana/in.niti.dharma.yajnavalkya) — Yājñavalkya, Sanskrit --- Source: [https://indike.org/pramana/ins.science.biswas-1996.v2.c44.s2.3](https://indike.org/pramana/ins.science.biswas-1996.v2.c44.s2.3) · Pramāṇa