11-10-2026, 04:51 PM
(10-10-2026, 02:41 PM)LisaFaginDavis wrote: You are not allowed to view links. Register or Login to view.The ink and pigments could all have been made quite inexpensively with easily-acquired ingredients. There's no gold, no minerals like malachite or lapis.According to McCrone's spectra, the blue paint is the mineral azurite Cu3(CO3)2(OH)2. It is more scarce than the chemically similar green malachite Cu2CO3(OH)2. They are You are not allowed to view links. Register or Login to view. in massive solid form, but neither should be particularly expensive as a pigment. Nothing like ultramarine pigment (lapislazuli) that was very rare and imported from Afghanistan.
All the best, --stolfi

