PERNAHKAH anda apabila memandu kereta terdapat perbezaan apabila pakai ray ban (kaca warna hitam) dengan kaca mata biasa? Kalau guna ray ban, bila kita pandang cermin kereta orang kat depan kita akan nampak kesan gam atau warna pelangi dicermin tersebut. Namun apabila kita memakai cermin biasa, kesan tersebut tidak nampak dengan naked eyes! Kenapa agaknya ye?
Masih tidak percaya? Nanti saya capture guna digital kamera!
Cuba cari di Google, kesan tinted pada cermin kaca! Dah jumpa di sini.
Tinted Eyeglass Lenses
If you wear glasses, remember that they not only help you see but they contribute to how others see you as well. The proper lens tint can make working at a computer more comfortable, reduce glare when driving, allow a target shooter to see the target more clearly, enhance the wearer’s appearance by hiding fine wrinkles around the eyes or simply help the wearer make a desired fashion statement.
How Lenses Are Tinted
Some lenses are tinted by adding a substance such as a metal oxide to the lens material when the lens is being created. Tints can also be applied to the surface of a lens. Surface application allows a wide variety of tints and creates a uniform darkness
across the entire lens, regardless of prescription strength. Modern technology has greatly increased the toughness of surface lens treatments.
Rice milling generates a by product know as husk . This surrounds the paddy grain. During milling of paddy about 78 % of weight is received as rice , broken rice and bran .Rest 22 % of the weight of paddy is received as husk . This husk is used as fuel in the rice mills to generate steam for the parboiling process . This husk contains about 75 % organic volatile matter and the balance 25 % of the weight of this husk is converted into ash during the firing process , is known as rice husk ash ( RHA ). This RHA in turn contains around 85 % – 90 % amorphous silica.
http://www.ricehuskash.com/details.htm
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