The main effects of detergent pH on clothing materials include the following aspects:

1. Cotton and linen fibers: Cellulose fibers such as cotton and linen are more stable under alkaline conditions, so they are suitable for cleaning with alkaline detergents. Under acidic conditions, cotton and linen fibers may undergo hydrolysis reactions, causing problems such as thinning and yellowing of clothing.
2. Silk wool: Protein fibers such as silk and wool are more stable under acidic conditions, so they are suitable for cleaning with acidic detergents. Under alkaline conditions, these fibers are prone to hydrolysis reactions, leading to thinning and yellowing of clothing.
3. Reactive dyes: Many clothes are dyed with reactive dyes. This dye may undergo hydrolysis reaction under acidic or alkaline conditions, causing the color of the clothes to fade or lighten. Therefore, when choosing a detergent, you should choose the appropriate pH based on the material of the clothes and the type of dye.
4. Detergent residue: Detergent may leave residues on clothes after use, and these residues may cause damage to clothes. For example, alkaline detergent residues on clothes may cause problems such as stiffness and clumping of the clothes. Therefore, when choosing a detergent, you should choose products with low or no residue.
In short, the impact of detergent pH on clothing materials is mainly reflected in the stability, color, texture, etc. of clothing. When choosing a detergent, you should choose the appropriate pH based on the material and characteristics of the clothes to ensure safe and effective cleaning of the clothes.