FUNDAMENTALS AND PROBLEMS OF COLOR:(1) ANALYTICAL ASPECTS OF COLOR, (2) COLORANT IDENTIFICATION

THE USE OF IDENTICAL COLORANTS IN SAMPLE AND STANDARD IS WIDELY RECOGNIZED (BUT NOT WIDELY ENOUGH PRACTICED) AS THE BEST MEANS FOR RAPIDLY OBTAINING SATISFACTORY COLOR MATCHES. ITS MAIN ADVANTAGE IS THAT, WHEN SIMILARLY PREPARED IN THE SAME MATERIAL, THE SAMPLE AND STANDARD CAN HAVE IDENTICAL SPECTRO-PHOTOMETRIC CURVES. THEIR COLORS CAN THEREFORE MATCH TO ALL OBSERVERS AND FOR ALL ILLUMINANTS. IN ORDER TO IDENTIFY THE COLORANTS IN A SAMPLE, AN ANALYSIS OF THEIR CHEMICAL NATURE MUST BE MADE. THREE METHODS ARE IN CURRENT USE: (1) SPECTROPHOTOMETRY OR COLORIMETRY, (2) WET CHEMICAL ANALYSIS (PRIMARILY FOR INORGANIC PIGMENTS), AND (3) THE IDENTIFICATION OF ORGANIC COLORANTS BY THEIR CHARACTERISTIC SOLUTION SPECTRA. OF THESE METHODS, THE THIRD IS BOTH THE MOST USEFUL AND THE LEAST WIDELY PRACTICED. THE ADVANTAGES IT OFFERS ARE DISCUSSED, AND TECHNIQUES FOR EXTRACTING ORGANIC PIGMENTS FROM THE SUBSTRATE ARE GIVEN. SEPARATION TECHNIQUES FOR MIXTURES OF PIGMENTS ARE ALSO DISCUSSED. EXAMPLES ARE GIVEN TO SHOW THE USEFULNESS OF THE TECHNIQUE. /AUTHOR/

  • Supplemental Notes:
    • Vol 39, No 509, PP 360-367, 9 FIG, 11 REF
  • Authors:
    • Saltzman, M
    • Keay, A M
  • Publication Date: 1967-6

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  • Accession Number: 00242878
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 15 1994 12:00AM