Glass Color Standards for Maple Sirup*
- 1 April 1956
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America
- Vol. 46 (4) , 293-299
- https://doi.org/10.1364/josa.46.000293
Abstract
Previous official color standards for maple sirup, designated Light Amber, Medium Amber, and Dark Amber, were solutions of sugar caramel in glycerin standardized in terms of transmittance at 560 mμ. These solutions were not satisfactory because of instability of color and inconvenience of repeated preparation. Glass color standards were accordingly developed to match the chromaticities of fresh standard solutions in 31.5 mm depth. An improved color comparator was devised for use with the glass standards. The caramel-glycerin solutions and maple sirups were characterized spectrophotometrically and in terms of several one-dimensional color scales in use in the sugar industry. Complete specifications for the standard solutions and new glass standards are presented in the CIE system. Color tolerances were established in MacAdam units of chromaticity difference and a simple one-wavelength method of testing glasses for the production of duplicate standards was developed.Keywords
This publication has 7 references indexed in Scilit:
- Transmittancy of commercial sugar liquors: dependence on concentration of total solidsJournal of Research of the National Bureau of Standards, 1952
- MAPLE SIRUP. IV. EFFECT OF HEATING SIRUPS UNDER CONDITIONS OF HIGH TEMPERATURE AND LOW WATER CONTENT: SOME PHYSICAL AND CHEMICAL CHANGESJournal of Food Science, 1952
- Measuring Color and Turbidity of White Sugar SolutionsAnalytical Chemistry, 1949
- Specification of Small Chromaticity Differences*†Journal of the Optical Society of America, 1943
- Visual Spectrophotometry*†Journal of the Optical Society of America, 1934
- The 1931 I C I Standard Observer and Coordinate System for Colorimetrya,bJournal of the Optical Society of America, 1933
- Maple Sirup Color Standards1,2Industrial & Engineering Chemistry, 1930