Research on synthetic blue spinels' color difference based on BFD color difference formula

Prepare four groups of blue synthetic spinel made with the flame fusion method and calculate the color difference in each specific group by applying the color difference formula BFD(l:c).It is concluded that there is color difference even among the same color specification of the.blue synthetic spinel.And the lightness L and chroma C both have more effects on the color difference of blue spinel than the hue H does.As for the 113# group blue synthetic spinel of low lightness and high chroma,its chroma difference is negative linear relationship to color difference(rDE-DC=-0.366) and the hue difference is positive linear relationship to the color difference(rDE-DH=0.357).It is opposite to the other three groups.In the process of synthetic spinel production,the effects of three elements of color on the color difference should be considered in order to find a way to reduce the color difference of the synthetic spinel of the same color specification and make them look almost the same.