Don’t wear gloves when you handle old books. From the British Library:

Whenever a manuscript is featured in the press or on television, we inevitably receive adverse comments about our failure to wear white gloves! The association of glove-wearing with handling old books is in fact a modern phenomenon, and one that has little scientific basis.

Essentially, we recommend that it is preferable to handle manuscripts with clean dry hands.

We were told the same thing when I studied book design at Reading. Gloves tend to cause more damage than they prevent. It’s one of those things that looks nice in photos.