Table 1. R_o Data of Residual Samples.

		Ro (%)
no.	temperature (°C)	maximum	minimum	average	number of samples measured
1	250	0.659	0.501	0.60	31
2	300	0.664	0.514	0.61	31
3	350	0.895	0.562	0.75	36
4	375	1.086	0.732	0.84	39
5	400	1.321	1.022	1.12	39
6	425	1.627	1.262	1.45	35
7	450	1.941	1.624	1.79	30
8	475	2.095	1.629	1.83	39
9	500	2.362	1.767	2.06	30
10	550	2.661	2.193	2.39	35