1.1 These test methods deal with the measurement ofoptical properties important to automatic equipment used by the United States Postal Service, such as optical character recog-nition (OCR) readers and barcode readers. These test methods can be used to examine finished mailpieces bearing address information, as well as the unconverted materials intended to be subsequently used in mailpiece construction. These test methods are limited to the use of a single instrument, the U.S.Postal Service Envelope Reflectance Meter Model 2 (ERM-2), 2 designed for use with mailpieces and materials intended for mailpiece construction such as paper and paper-like syn-thetics and inks.
