31-10-2025, 08:57 PM
(31-10-2025, 08:28 PM)asteckley wrote: You are not allowed to view links. Register or Login to view.@Magnesium has also located a reference where a 15th century manuscript's ink was found to contain titanium due to the presence of crystalline quartz [with titanium oxide inclusions]
Yes, and I posted another reference to another manuscript with ilmenite (FeTiO3) in the ink.
But simple iron-gall ink should not contain any titanium, in any form, for the reasons I explained. Those inks were not iron-gall but some other formula with brown-black mineral pigments.
All the best, --stolfi