Colorimetry

Billmeyer, F.W., Jr. “Universal Color Language Definitions for Some Philatelic Color Aids,” The American Philatelist, Vol. 96, No. 6, June 1982, pp. 506-516.
Caswell, L.R. “Evaluation of Forensic Methods for Overprint Analysis,” The Collectors Club Philatelist, Vol. 91, No. 1, January-February 2012, pp. 35-45.
Herendeen, D.L, Allen, J.A. and Lera, T. “Philatelic Shade Discrimination Based on Measured Color,” The London Philatelist, Vol. 120, No. 1384, April 2011, pp. 105-117.
Herendeen, D.L, Allen, J.A. and Lera, T. “Philatelic Shade Discrimination Based on Measured Color,” Published by the Institute for Analytical Philately, November, 2010.
Kelly, K.L, and Billmeyer, F.W. Jr. “APS Manual for Determining Color Designations of Stamp Colors,” The American Philatelist, Vol. 95, No. 8, August 1981, pp. 709-717, 758.
Lera, T. “Colorimetric Analysis of an Enhanced Cancel on a Mauritius 1d Stamp,” Fakes Forgeries Experts, No. 14, April 2011, pp.103-104.
Liston, E.M. “Scientific Examination of a New Venezuelan ‘Color Error’,” The Collectors Club Philatelist, Vol. 91, No. 3, May-June 2012, pp. 163-167.
Tyler, V.E. and Peck, G.E. “Characterization of Genuine Stamps, Reprints, and Forgeries of the 1867 and 1868 Issues of the Roman States by Diffuse Reflectance Spectroscopy,” American Philatelist, Vol. 92, No. 6, pp. 580-587. 
White, R.H. (ed.) Scientific Analysis of El Salvador (1867) First Issue, Its Spiro Forgeries, and the 1c Colour Error,” Academus 21, 2017, pp. 91-97.
GALLEGOS, F.,
and LERA, T.
Color in Philately, The Philatelic Foundation, New York, 1979.

Copyright 2009-2014, Institute for Analytical Philately, Inc.  All rights reserved.