Eye color for a plausible argument stating that some eyes can or do change, based on chemical reactions and hormonal changes within the body. Studies on Caucasian twins, both fraternal and identical, have shown that eye color over time can be subject to change, and major demelanization of the iris may also be genetically determined. Most eye-color changes have been observed or reported in the Caucasian population with hazel and amber eyes. Carleton Coon created a chart by the original Martin scale. The numbering is reversed on the scale below in the (later) Martin–Schultz scale, which is (still) used in physical anthropology.
Colour sorter likely to fluoresce. In mining sorting industry, It is also called sensor-based sorting technology. Use Optical Color (CCD Color Camera) combineX-Ray Sorting Technology and NIR (Near Infrared Spectrometry) to pick out the impurity of ore, minerals, stone and sand products, separate ore into two or more categories. In the recycling industry, colour sorters can distinguish between coloured and colourless PET and coloured and colourless HDPE flakes, as well as being able to separate flakes by colour before re-granulation. Plastic colour separators are used to separate mixed-colour plastic flakes or granules. Plastic type separators (Sensor-based sorting technology) are used to separate