“Light rays of short wavelength damage cotton textiles much more drastically when these rays alone strike the fabric than when mixed with the other light-rays from the sun. [...] While all sections of the sun’s spectrum tend to damage the cloth, the energy from the ultraviolet and blue spectral regions has by far the most drastic action. [...] But the degrading influence of solar radiation is not limited to the short wavelength portion of the spectrum, the scientists [P.J. Flynn, J.E. Sands and K.S. Campbell of the U.S. Department of Agriculture's Southern Regional Research Laboratory] found. In eight months at least one-fifth of the fabric’s strength was lost through exposure to the longer wavelengths of energy as transmitted by the yellow and red filters.”