● Appearance
High-quality products are uniform and viscous, with no visible impurities or stratification, and defective products have thicker and thinner layers.
● Color
Good laundry detergents are stable in color and will not change color after long-term storage; poor laundry detergents will have dispersion and fading.
● Solubility
It can dissolve in water quickly, it is difficult to dissolve in water or need to be stirred for a long time. The product that only has a partial cleaning effect is a product that is not of good quality.
● Fragrance
Good laundry detergents have a pure and long-lasting fragrance; bad ones are sour and astringent.
