It seems conceivable to me that f102v2 represents the components of dyes. These could be obtained from stones ( Lapis Lazuli) as well as from plants. For example, blue and red tones were extracted from Chrozophora tinctoria. The extraction of this dye has been known since the 13th century and the product was used e.g. in book illumination (turnsole). Plant dyes were a cheaper substitute for higher quality dyes such as Lapis lazuli.
I am not saying that Chrozophora tinctoria is shown on f102v2, but it is one of several possibilities. Other plants, for example Isatis tinctoria and Indigofera tinctoria, are also possible for ( darker ) blue. Not to mention the other colors.
I am not saying that Chrozophora tinctoria is shown on f102v2, but it is one of several possibilities. Other plants, for example Isatis tinctoria and Indigofera tinctoria, are also possible for ( darker ) blue. Not to mention the other colors.