A-D Strips Film Base Deterioration Monitors

Every motion picture archives need these to protect their collection. Cellulose acetate film undergoes a slow form of chemical deterioration known as ''vinegar syndrome''. A-D strips represent a safe and reliable method for detecting, measuring and recording the severity of vinegar syndrome in film collections. When placed inside a closed container in the presence of acidic vapor given off by degrading film, A-D strips change color to indicate the severity of the level of acidity. Each kit contains instructions, a reference pencil printed with 4 bands of color that correspond to the level of acidity, as well as 250 detector strips (measuring 1.5'' x 0.375'').