Heritage Science

Table 4 Color parameter b* and calcination conditions for modern Co–Al blue pigments (CoAl₂O₄ spinel) prepared by various methods

From: The atypical hues of the Santa Cruz blue-and-white cargo: non-invasive analysis of glaze defects and color variations in mid-Ming porcelain

Authors	Reference (Fig. 7)	b*	Temperature (°C)	Soaking time (h)
Tang et al. [120]	CB-1a	− 43.1	1250	1
Tang et al. [120]	CB-1b	− 22.4	1150	1
Peymannia et al. [119]	CB-2	− 31.1	1100	1
Llusar et al. [118]	CB-3a	− 39.4	1400	3
Llusar et al. [118]	CB-3b^a	− 22.4	1185	1

^aCB-3a pigment mixed with porcelainized glaze (1:5) and enameled on biscuit

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