Ultramarine (Lapis lazuli)

Ingredients

Lapis Lazuli

Preparation Steps

Original Recipe Text

Blue colour was used to convey specific orthoepic principles or variant readings (p. 3). Medieval technical treatises report lapis lazuli for blue inks (p. 9).

Evidence

"The Raman spectra of the blue pigment present a sharp peak at 546 cm−1, characteristic of ultramarine blue pigment extracted from Lapis Lazuli"

Remarks

The blue dots, without impurities, mark the third-level of variants, likely added in a separate, second phase (p. 13). They do not bear the mercury contamination found in the red, yellow, and green pigments. Analysis on f. 3r, l.4; f. 7v, ll. 3–5.