kǎo​lán

bluing

Senses

烤蓝/ 烤藍 kǎo​lán bluing

to treat metal surfaces to create a protective oxide layer, usually appearing dark blue or black

烤蓝/ 烤藍 kǎo​lán enameling

to apply a decorative glaze or enamel to metal through a heating process

References

same_as 发蓝/發藍 烤蓝/烤藍
same_as 烧蓝/燒藍 烤蓝/烤藍