Search results
Results From The WOW.Com Content Network
Porous glass pore-size gradient (large pores on the right); coloring based on the Tyndall effect. Glass containing two or more phases with different refractive indices shows coloring based on the Tyndall effect and explained by the Mie theory, if the dimensions of the phases are similar or larger than the wavelength of visible light. The ...
Uranium glass used as lead-in seals in a vacuum capacitor Uranium glassware glowing under ultraviolet light. Uranium glass is glass which has had uranium, usually in oxide diuranate form, added to a glass mix before melting for colouration. The proportion usually varies from trace levels to about 2% uranium by weight, although some 20th-century ...
Its use as a food dye was legalized in the US by the Pure Food and Drug Act of 1906. [6] By early 1920s, it was produced mainly for the food industry, [ 7 ] with 2,170 pounds (0.98 t) made in America in 1924, [ 8 ] rising to 9,468 pounds (4.29 t) in 1938 [ 9 ] and approximately 50 tons in 1967.
News. Science & Tech
The Food and Drug Administration has said it is banning the use of Red No. 3, a synthetic dye that has long been used in the U.S. to color certain foods, such as candies and colored beverages, as ...
CNN reports that some of the most popular food and beverage brands either never used red dye No. 3 — also known as FD&C Red No. 3 — or had stopped using it in recent years. For example, Just ...
A variety of food colorings, added to beakers of water. Food coloring, color additive or colorant is any dye, pigment, or substance that imparts color when it is added to food or beverages. Colorants can be supplied as liquids, powders, gels, or pastes. Food coloring is commonly used in commercial products and in domestic cooking.
Science & Tech. Shopping. Sports