Controlled Substances Act. An Act to amend the Public Health Service Act and other laws to provide increased research into, and prevention of, drug abuse and drug dependence; to provide for treatment and rehabilitation of drug abusers and drug dependent persons; and to strengthen existing law enforcement authority in the field of drug abuse.
What Is Polycarbonate ? The Stuff They Use For The Lenses In Sunglasses, Safety Glasses And Goggles. Polycarbonates are a particular group of thermoplastics. They are easily worked, molded, and thermoformed; as such, these plastics are very widely used in modern manufacturing.
High index plastic lenses. High index plastic is a term used to describe a variety of plastic lens materials that are thinner and lighter than regular CR-39 plastic. For a given prescription power and lens design, the factor that determines lens thickness is the index of refraction (also called refractive index) of the lens material.