Currents may also be generated by density differences in water masses caused by temperature and salinity variations. These currents move water masses through the deep oceanâtaking nutrients, oxygen, and heat with them. Occasional events also trigger serious currents. Huge storms move water masses.
Ray-ban and most other manufacturers frames are made from Plastic compounds. Ray-ban used to make all its glasses out of 'glass'. Now it makes its sunglass products out of scratch resistent plastics. Often they will 'feel' like glass but are in fact most usually plastic production.
In a way, acetate is one type of plastic materials. Compared standard plastic glasses frames, acetate plastic glasses frames are more durable. Acetate frame glasses are usually light weight and has good flexibility to it.And acetate frames can be carved out of rich colored patterns on the frames.ctually, acetate frame glasses are one kind of plastic frame glasses. However, it is lighter than the latter one, and is not easy to break. Even it is broken, the fragment is not that shape so that the damage to the eyes and the face could reduce maximize.