A-D Strips (250x) Film base deterioration monitors
A-D Strips are dye-coated paper strips that detect and measure the severity of acetate film deterioration, a.k.a. vinegar syndrome, in film collections. The strips are sold in packages of 250 and come with a user's guide and a pencil printed with bands that serve as color references.
1 Pack = 250 A-D Strips
User's Guide