Oct, 31, 2024

Vol.57 No.5

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Review

  • KISE Journal of Korean Institute of Surface Engineering
  • Volume 38(2); 2005
  • Article

Review

KISE Journal of Korean Institute of Surface Engineering 2005;38(2):83-87. Published online: Nov, 30, -0001

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Color Enhancement by Oxygen Torch in Blue Sapphires

  • Song Oh Sung;Kim Sang Yeob;
    Seoul Jewelry Research Center, University of Seoul;Seoul Jewelry Research Center, University of Seoul;
Abstract

We enhanced the color of blue sapphires and rubies successfully by using a oxygen-propane torch flame annealing, which had not been employed so far. We confirmed that about 1 mm-thick de-coloring of the corundum samples were available with 60 minutes flam

Keywords Blue sapphire;enhancement;Oxygen torch;Heat treatment;Tone;