The science of blue light wavelengths have received little attention until late. We are speaking of wavelengths from around 400-495nm this also encompasses indigo. However, the most interesting wavelengths exist from 410-440 nm and appear to enhance pathogenic fungi more than lower wavelengths. Since conventional UVA are commercially tailored for wavelengths in the 300 to 405 nm range and are rapidly loss during exposure they are fugitive over time and loose their effectiveness. The need for a blue blocker that is sustainable and extends life cycle while having high absorptivity in the 400 to 440 nm range with bahochromic and hyperchromic tendency is a growing need in both agriculture control of pest, pathogenic fungi and now for control of circadia rhythms and eye damage from computer screens. Question since pigments are not the solution and dyes are not compatible in polyolefins (bleeding) that reduces the choices for a solution and limits the scope of a solution. Have there been any new advances that make economical sense in solving this problem globally?
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