Minerals and Metals in Ancient India v1.c28.s8.t1.19

v1.c28.s8.t1.19

| Sample No. in Table 20.4 | Discrete Phases | Evidence of Annealing or Heat-treatment | Evidence of Cold or Hot working |
| 7. | Lead (L) and Inter-metallic compounds (IC) | Annealing after casting | Slip and strain lines (SLSTL) and Flattened Grains (FG) suggest severe hammering or cold working |
| 8. | Lead (L) and Oxides (O) | Twin Grains (TG); annealing was done at Recrystallisation Temp. (RT) after cold working | Cold working |
| 9. | L at Grain Boundary (GB) | Annealing below RT | No evidence |
| 10. | — do — | — do — | — |
| 11. | L and O; otherwise no alloy phase; no dendrite; polyhedral grains | — | — |
| 12. | Same as 7 | Heat-treated or annealed below RT; then . . . . . | mild working |
| 13. | Distorted polygonal grains | Annealing below RT | No evidence |
| 14. | L at GB; large grains | A few twinning crystals suggest annealing at RT before cold or hot working | SLSTL and FG suggest cold or hot working |
| 15. | Equiaxial grains | — | — |
| 16. | Same as 14 | Same as 14 | — |
| 17. | L and IC at grain boundary | Annealing and Heat-treatment below RT suggested by etched structure | No evidence |
| 18. | Dendritic Structure | No evidence | Mild hot or cold working |
| 19. | O at grain boundary | No evidence | No evidence |