Available Ray-Ban Lens Options. There are many different sunglass options besides polarized lenses available to Ray-Ban buyers. While polarized lenses are a great choice, they aren't for everyone-knowing the differences between lens options can make for a better purchase.
Products. Chemical Methods, Inc. is a leading supplier of industrial chemicals used in factories that make metal products. We develop outstanding alkaline cleaners, acidic cleaners, paint pretreatment chemistry, metalworking fluids and corrosion inhibitors.
Heat Treatment, annealing, and tempering are three of the most well-known methods for treating metals. Depending on the treatment used, a material may become more or less brittle, harder or softer, or stronger or weaker. The method chosen depends on the desired characteristics of the material.