[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Reference works](https://indike.org/pramana/ins.reference) › [An Encyclopaedia of Indian Archaeology](https://indike.org/pramana/ins.reference.ghosh-1989) › v1.c21.s9.9 # An Encyclopaedia of Indian Archaeology v1.c21.s9.9 An Encyclopaedia of Indian Archaeology v1.c21.s9.9 - **Language:** English ### [v1.c21.s9.9](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s9.9) Though even 1% of As increases the hardness of copper from 124 to 177 (Brinell hardness nos.), still only 8% artefacts are alloyed wth arsenic. Arsenic may have been used only as a deoxidizer for closed castings. Three examples from SURKOTADA have more than 13% lead. The metal forging techniques of ‘sinking’, ‘raising’, ‘running’, cold work, annealing, riveting, lapping, etc., are evidenced in various tools and pots. - [Previous: v1.c21.s9.8](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s9.8) - [Next: v1.c21.s9.10](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s9.10) - [Up: v1.c21.s9](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s9) ## Linked texts (1) - [Surkotada](https://indike.org/pramana/inp.site.surkotada) --- Source: [https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s9.9](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c21.s9.9) · Pramāṇa