Abstract
THE optical effect described by Mr. Burke in NATURE of May 30, p. 613, is well known to the practical papermaker. In matching the tone of a 'white' paper it is essential to employ direct illumination and direct vision. Any angular deviation in lighting or vision gives rise to misleading tones of red or blue.
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STRACHAN, J. Reflexion from Paper. Nature 149, 732–733 (1942). https://doi.org/10.1038/149732b0
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DOI: https://doi.org/10.1038/149732b0
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