What is this close-up picture? (WotsThat: Sheet music paper texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

VanadiniteX · Accepted Answer

Sheet music paper texture (macro). The five-line musical staff used in sheet music today was standardised in the 11th century by a monk named Guido of Arezzo, who also invented the do-re-mi system still used to teach music.

Answer: Sheet music paper texture (macro)

More man made close-ups