... that many of the TAPPI Standard Test Methods require the use of reference materials for calibrating the instruments used in testing?  As an example, optical properties tests (brightness, whiteness, and other tests of appearance properties) are tests where the need for specialized reference materials is widely recognized.  The use of certified reference measures of mass, distance, time, and volume are also widely used within the paper industry measurement organizations for verifying calibration of basis weight balances, cutting dies and templates, tensile testers, to name only a few of the more obvious examples.
As assistance to those needing a source of reference calibrating materials or equipment, TAPPI maintains a Reference Materials List which is described in TAPPI Standard Practice T 1211.  Suppliers of standard materials for TAPPI Standard Test Methods that would like to be placed on the Reference Materials List are encouraged to consult this Standard Practice for guidance on the steps to take in order to be listed.  In addition to reading the requirements of TAPPI T 1211, interested parties are encouraged to contact Charles Bohanan, TAPPI Director of Standards and Awards, at standards@tappi.org to discuss specific needs of the Reference Materials program or assistance in becoming a listed material source.