gold

Evidence

"Mostly, black is mürekkebi (‘soot ink’) was used in writings, but there were also some documents and manuscripts where colorful and gold inks were used."

Remarks

Gold ink and gold leaf were utilized in high-status Ottoman archival documents, such as those belonging to the Fatih Sultan Mehmet period (p. 240). Gold leaf was sometimes used on the covers of registry books, though it was rarer than on manuscripts (p. 250).