Shiseido offers a hair straightening solution called Crystallizing Straight, which is a straightening treatment that combines exclusive hair care items with the straightening treatment to enhance the overall finish and results. The product is available in two versions, N1 and N2, with N1 being for natural to slightly sensitized hair, and N2 being for fine or tinted hair. The product is effective in breaking down the hair bonds that give it shape, allowing it to become pin-straight when the flat-iron is applied.
Positive aspects of the product include its effectiveness in straightening hair and its ability to enhance the overall finish and results. However, one negative aspect is that it can cause damage to bleached hair.
The ingredients of the product are not explicitly listed in the search results. However, it is mentioned that some hair straighteners contain formaldehyde, which can be harmful to health. It is best to avoid hair straightening products that contain formaldehyde, formalin, methylene glycol, glyoxylic acid, glyoxyloyl carbocysteine, glyoxyloyl keratin amino acids, butylphenyl methylpropional, triethanolamine, fragrance, methylchloroisothiazolinone, methylisothiazolinone, and ethoxylated ingredients (PEGs, Polysorbates, “-eth”) .
