Date Line for Blind / Date Line for Blind

The Shelf Life Paster is designed for the blind to help them check the shelf life of food and medicines much more conveniently. There are certain chemical substances which can be oxidized slowly on the paster. During the oxidation, gases will be produced and the paster will expand. Moreover, when the paster is attached to the food, which means they are in the same environment, the rate of the paster’s expanding will be the same as that of the food’s spoilage.