As the saying goes, there is 24K pure gold, while 24K pure handsome, 24K refers to 99.99% pure gold. There is also a popular saying: a person is extremely handsome in a certain character, and 24K pure handsome means that this person is extremely handsome.

Note: 1, k: refers to the purity of gold.

2. Purity: refers to the brightness of color. From a scientific point of view, the brightness of a color depends on the single degree of light emitted by this hue. All colors with monochromatic light characteristics that can be distinguished by human eyes have a certain vividness. Different shades not only have different lightness, but also have different purity. For example, red is the highest purity hue in pigments, orange, yellow and purple are also high purity pigments, and blue-green is the lowest purity hue in pigments. In the range of daily vision, most of the colors seen by the eyes are gray, that is, unsaturated colors. With the change of purity, the world has such rich colors. Even if the purity of the same tone changes slightly, it will also bring about changes in color personality.

The gold content per carat is 4. 166%,18k =18 * 4.166% = 74.998%, 24k = 24 * 4. 16%.

24K contains 99% gold, 22K 9 1.7%, 18K 75. 1%, 14K 58.5%, 12K 50%.