The Transmission of Ultra-violet Light through Tracing Cloth


DURING an investigation of the effects of ultraviolet light on various types of blue print paper, it was found that ultra-violet light from a quartz mercury vapour lamp passed through ordinary commercial tracing cloth (or linen) to an extent both unexpected and surprising. A number of tracing cloths were obtained, and spectrograms were taken with three seconds exposure using a Hilger quartz spectrograph.

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YOUNG, C. The Transmission of Ultra-violet Light through Tracing Cloth. Nature 123, 47 (1929).

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