Heritage Science

Table 1 Pristine glaze chemical composition (Wt%)

From: Corrosion of glaze in the marine environment: study on the green-glazed pottery from the Southern Song “Nanhai I” shipwreck (1127–1279 A.D.)

Sample No	Na₂O	MgO	Al₂O3	SiO₂	K₂O	CaO	Fe₂O₃	CuO	PbO
N1	0.4	0.2	4.4	28.2	0.4	0.2	0.7	2.4	63.1
N2	0.3	0.1	5.2	30.7	0.3	0.3	0.7	2.2	60.2
N3	0.4	0.1	4.3	29.6	0.6	0.3	0.8	2.9	61.0
N4	0.4	0.1	4.3	28.9	0.5	0.3	0.8	3.8	60.9
N5	0.5	0.2	6.4	30.0	0.3	0.1	0.5	2.8	59.2

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