2.4. Instrumental color
Color measurements for all investigated samples were performed
with Hunter colorimeter (ColorTec PCM, USA) using D65
illuminant in Hunter color space (L⁄, a⁄, and b⁄). Corresponding values
of hue angle (H⁄) and chroma (C⁄) were calculated as
Prior analysis, colorimeter was calibrated by white tile (standard
no. LS-13903) with standard color coordinates L⁄ = 94.65,
a⁄ = 0.82 and b⁄ = 0.83. The L⁄, a⁄ and b⁄ values were obtained
in triplicates and analyzed in Hunter Associates glass sample cup
(m = 25 ± 1 g) that was placed in colorimeter.
2.4. Instrumental colorColor measurements for all investigated samples were performedwith Hunter colorimeter (ColorTec PCM, USA) using D65illuminant in Hunter color space (L⁄, a⁄, and b⁄). Corresponding valuesof hue angle (H⁄) and chroma (C⁄) were calculated asPrior analysis, colorimeter was calibrated by white tile (standardno. LS-13903) with standard color coordinates L⁄ = 94.65,a⁄ = 0.82 and b⁄ = 0.83. The L⁄, a⁄ and b⁄ values were obtainedin triplicates and analyzed in Hunter Associates glass sample cup(m = 25 ± 1 g) that was placed in colorimeter.
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