On the bottom of a plastic bottle, container, or bag, one would typically see a series of numbers within the triangular arrow symbol. One sees numbers 1, 2, 3, 4, 5, 6, and 7 being printed in a lot of commonly used plastic items. While these numbers are helpful for the consumer who aims to recycle properly, they are also confusing at times. Resin Identification Codes is the technical name for...