Figure 7 - Development of portable microfading spectrometers for measurement of light sensitivity of materials

Fading of orpiment in linseed oil at various thickness (400?m in black, 320?m in green and 100?m in blue) and a 400?m layer orpiment powder packed between two glass microscope slides (in red). Top: evolution of ?R averaged between 520 and 545nm. Middle: colour change. Bottom: difference spectra between the final spectrum and the initial spectrum

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Reference

Development of portable microfading spectrometers for measurement of light sensitivity of materials - Scientific Figure on ResearchGate. Available from: https://www.researchgate.net/figure/Fading-of-orpiment-in-linseed-oil-at-various-thickness-400m-in-black-320m-in-green_fig3_265850364 [accessed 12 Jun 2025]

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Figure 7 Fading of orpiment in linseed oil at various thickness (400?m in black, 320?m in green and 100?m in blue) and a 400?m layer orpiment powder packed between two glass microscope slides (in red). Top: evolution of ?R averaged between 520 and 545nm. Middle: colour change. Bottom: difference spectra between the final spectrum and the initial spectrum

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<a href="https://www.researchgate.net/figure/Fading-of-orpiment-in-linseed-oil-at-various-thickness-400m-in-black-320m-in-green_fig3_265850364"><img src="https://www.researchgate.net/profile/Haida-Liang-2/publication/265850364/figure/fig3/AS:480544929652738@1491582247794/Fading-of-orpiment-in-linseed-oil-at-various-thickness-400m-in-black-320m-in-green.png" alt="Fading of orpiment in linseed oil at various thickness (400?m in black, 320?m in green and 100?m in blue) and a 400?m layer orpiment powder packed between two glass microscope slides (in red). Top: evolution of ?R averaged between 520 and 545nm. Middle: colour change. Bottom: difference spectra between the final spectrum and the initial spectrum"/></a>