Additional file 1 of Optimizing the thermal treatment for restoration of brittle archaeological silver artifacts

Additional file 1: Figure S1. An example of restoration of brittle silver artifact by conventional thermal treatment (using high temperature torch). Figure S2. Preparation of the simulated Ag-Cu alloy flake samples. Figure S3. Position of spot analysis and EDS spectrum (Sno corr). Figure S4���S15. Accelerated aging by different solutions. Figure S16. Accelerated aging by 0.1 M Fe(NO3)3 + 1.0 M AgNO3 for 27 days. Figure S17���S33. Load-displacement curves (P-x) of different samples obtained by three-point bending tests (black dotted lines: no corr-Sno corr, the original simulated Ag-Cu alloy samples; corr-Scorr, the corroded simulated Ag-Cu alloy samples). Figure S34. The diamond-shaped indentation left on the surface of the sample after microhardness tests. Figure S35. The microstructure of the samples after thermal treatments. Figure S36. Position of spot analysis and EDS spectrum (S850). Figure S37. Position of spot analysis and EDS spectrum (S550). Figure S38. Position of spot analysis and EDS spectrum (Sno air 850). Figure S39. Schematic diagram of simple-bending experiment. Table S1���S17. Calculation results of ��bb, Eb, and HV of different samples. Table S18. MATLAB code of P-f curve extrapolation.