In 1903, won the Nobel Prize in Medicine for his use of ultraviolet light in the treatment of tuberculosis. Since then, ultraviolet lights have been widely adapted for all kinds of uses: sterilizing hospitals, sterilizing water, germicidal lamps in food establishments, and even curing nail polish faster. If UV light is so effective, how can it be applied to improving indoor air quality for residential HVAC systems? Will it kill mold and bacteria in HVAC systems? Yes, but you need to understand the priorities of indoor air quality and the types of UV lights available for residential HVAC systems.
In 1981, the effectiveness of sun bleaching on a wide variety ofstain and paper types was confirmed by studies undertaken at theCenter for Conservation and Technical Studies, Fogg Art Museum, andthe first attempt to test physical changes in aqueously sun bleachedpapers, using the TAPPI Official Standard for Surface Strength ofPaper (#T459 os-75), was published  . The visual effectiveness of lightbleaching was particularly apparent in samples discolored by waterstains, oil off-set, foxing, oxidation, matburn, and adhesive. The results of the TAPPIsurface strength test indicated that the critical wax number forbast and chemical wood pulp paper samples increased very slightly inaqueously light bleached samples, reflecting an increased resistanceto picking (). Rag paper samplesregistered a slight decrease in critical wax number. All three papertypes had alum rosin size.
How to mix matrix v light bleach?
Most powerful LED grow lights on the market today need to be kept 12-30” away (or more) to prevent light bleaching and early leaf death, which means that they may need more vertical room than some HPS models.
Compared to untreated and washed only samples, both water andethanol achieved a lighter value (L*) (), and chromatically shifted towardnegative readings, in the direction of green (loosing red) in thea* () and blue (loosingyellow) in the b* (). Thissuggests that water soluble items could be effectively lightbleached in water/ethanol solutions.Fig. 24. AQUEOUS LIGHT BLEACHED 24 HRSFig. 25. ETHANOL LIGHT BLEACHED 24 HRS