The measure used to determine the acid or alkali value of a substance is called pH. The pH of the human body is 5.5. The pH value of all products to be used by humans must be compatible with this pH value of the body. High pH values ​​prevent the production of lipids in the skin, leaving the skin unprotected. Water loss increases on dry and sensitive skin. In humans, microorganisms that cause disease can hardly reproduce at pH 5.5. Therefore, products with this value have antiseptic properties and prevent bacteria and fungi from sticking to the skin.

Pigments are chemical substances that form a living organism and give it a special color. Pigments are molecules that form colors. Light energy is required to activate these pigment molecules.

Pigments and dyestuffs are used in the textile industry to dye polyester yarns and polyester fabrics. Dyestuffs are chemicals that are soluble in plastics such as polyester. Pigments color the poyesters only by dispersion.

Pigments and fillers are the substances necessary to form the paint. In some paint production methods, special effective pigments are used. Fillers are used to provide high quality paint.

In this respect, it is important to determine the pH value of aqueous suspensions prepared for pigments and fillers used in the coloring of textile products. Accredited laboratories also carry out test and analysis studies to determine the pH value in the context of chemical and ecological tests. These studies are based on the following standards:

 

• TS 2326 EN ISO 787-9 General test methods for pigments and fillers - Part 9: Determination of the ph value of the aqueous suspension
• EN ISO 787-9 General test methods for pigments and extenders - Part 9: Determination of the pH of an aqueous suspension