pH is a measure of the acid-base strength of a solution, and is a simple way to express the concentration of hydrogen ions in a solution (pH=-lg[H+]), with values generally ranging from 1 to 14 and 7 being neutral. When the pH is less than 7, it is acidic, and the smaller the pH value, the stronger the acidity; When the pH is greater than 7, it is alkaline, and the higher the pH value, the stronger the alkalinity.
The hazards of unqualified pH values of textiles
Normally, human skin is weakly acidic to ensure a balanced microflora. In the process of textile production, desizing and boiling, bleaching or dyeing, printing, finishing and other processes need to use soda ash, caustic soda, pH adjusters, surfactants, etc., if these chemicals are not fully washed or neutralized, the acid and alkali on the fabric are too high, beyond the pH of human skin pH adaptation range, it is easy to cause skin itching, allergies, inflammatory diseases, and even damage the human body's sweat glands and nervous system, affecting human health.
