In the latest edition of Spectroscopy Magazine, old friend and colleague Dr. Jerry Workman and Dr. Howard Mark discuss the use of photometric standards in the calibration of instruments to assure accurate measurements of transmittance and reflectance. We're happy to note that all the reference materials mentioned come from Avian Technologies. We have a long history of working with Dr. Workman at a number of companies incorporating our standards into successful lines of spectrophotometers and research instruments. Workman and Mark have also written on calibration of instruments for wavelength accuracy, also using Avian Technologies artifact standards.