(08-06-2023, 10:57 PM)Ofnuts Wrote: Usually, these old manuscripts are handled in laboratories that have more powerful techniques than plain photography at their disposal, such as monochrome lighting, IR/UV photo, transparency lighting, X-Ray...
@MTV613, if you don't have access about what Ofnuts told you, I would try different type of photography, like a light board under the vellum with different color lighting, same from above, did you tried with a black light (the one in night club) or aquarium light?
then maybe mixing all those different pictures in GIMP, etc...
The most important part IMHO, in your case, is the photography part.
Patrice