When there is significant aerosol (typical of most modern polluted conditions), the scattered light has less dependence on wavelength, making a whiter daytime sky.
en.wikipedia.org They are pale greyish when young, becoming whiter and covered with a semi-translucent and slimy membrane, often with an ochraceous flush at the centre.
en.wikipedia.org Gargling for 20 minutes with a spoonful of oil (a.k.a. oil pulling) can help clear up germs in the mouth, leading to fresher breath, whiter teeth, and healthier gums.
www.allure.com If alabaster with a smooth, polished surface is washed with dishwashing liquid, it will become rough, dull and whiter, losing most of its translucency and lustre.
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