Acid-Detection Strips, sold in packages of 250 strips (1-1/2 x 3/8in.) with a color reference pencil and users guide, are instrumental in the detection of vinegar syndrome. This is a form of chemical deterioration found often in film collections. Vinegar Syndrome is the culprit in a multitude of problems, including causing film to shrink, buckle, and become brittle. It is often characterized by a strong vinegar-like smell. The acidic vapor causes these acid- based strips to change color in response, and comparing the strips to the pencil can give an indication of how far the damage has progressed. Consider duplicating film affected by vinegar syndrome and storing it in one of our MicroChamber boxes to retard further deterioration.