What do the numbers on the hair dye stand for?

1, chromaticity

Used to indicate the amount of melanin contained in hair, and different shades show different shades of hair. Generally speaking, hair is divided into ten shades, which are represented by the numbers 1 to 10 respectively. The smaller the number, the higher the melanin content and the darker the color. Conversely, the larger the number, the less melanin and the lighter the color. This relationship is as follows:

1, dark black, 2, natural black, 3, dark brown, 4, brown, 5, light brown, 6, dark gold, 7, gold, 8, light gold, 9, light gold 10, extremely light gold.

2. Tone

Tone determines the specific color of a color. The corresponding relationship between hue and quantity of different manufacturers may be different. The corresponding relationship between hue and number is as follows: 1, gray-blue, 2, purple, 3, golden, 4, copper, 5, bordeaux, 6, red, 7 and green.

Extended data:

Chromaticity uses shades to describe the difference in chromaticity. Generally speaking, there are two kinds of chromaticity: one is natural chromaticity, that is, the shade of natural hair color. The second is the target chromaticity, that is, the dark or light color to be dyed.

The chromaticity range is from 1 to 10, the color below 6 degrees is dark, and the color above 6 degrees is light. Generally, when dyeing hair, the higher the chromaticity (i.e. the lighter the color), the greater the damage to the hair and scalp, because the high concentration of hydrogen peroxide will enhance the stimulation to the scalp, and light color will fade more easily than dark color.

Pay attention to the protection of scalp before dyeing hair, because hair dye and hydrogen peroxide are very irritating to scalp. Don't wash your hair before dyeing it. /kloc-dye your hair after 0/-2 days. Scalp oil can protect your scalp from injury, followed by pre-dyeing care. You can use products such as hair care and breast enhancement.

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