Photograph the label from some different angles
A digital camera is better than a phone but a phone will do if it is sitting on something so there is no shake .
Drop those images into any photo editing softwear and play wth the levels &/or contrast.
Human eyes do not see white on white but the camera does .
I find inverting the image ( called make negative or make slide on some apps ) so the whites become black & the blacks become white also helps.
DO NOT USE A FLASH .
Asa tech that services mostly very old gear, having sun bleached tags is the norm for me