I am looking for the spectral emittance - or absorbance - of ordinary typewriter paper at ambient temperature or slighly higher (roughly between 0 and 100°C). I need tabled values of the emission coefficient in function of wavelength for visible light and near infrared ratiation (thus from approx. 0.3 to 10 or 20 microns) or a graph (in the form epsilon vs. lambda).
I appreciate measured data I may cite, or a hint to a scientific article.
Thank you for your help.
There is no "ordinary typewriter paper". Most are mixtures of different types of pulps plus one or two inorganic pigments; many include dyes for color adjustment and "optical brighteners" (OBA). The latter generally absorb in the green and emit in the blue. Another point to consider is that most of the available data come from the colorimetry. This involves standard illuminants and diffuses (no "direct light) reflectance or absorption in general. In any case, I will try to approach to you some articles with graphics and data, as soon as possible.
Correcting a mistake: sorry, my answer should have said "absorbed in the UV and emits in the blue," not "absorbed in green ..."
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