Fig. 4: Microscopic cross-sectional images of the sample at 50× magnification under different illumination conditions.
From: Exploring thitsi in Qing Dynasty lacquerware: Insights from a preliminary study

a Visible light, b UV light, c blue light.
From: Exploring thitsi in Qing Dynasty lacquerware: Insights from a preliminary study

a Visible light, b UV light, c blue light.