There is no absolute "better or worse" for ammonia value; it only depends on "scene adaptation". Choosing the right ammonia value can balance both effect and practicality. Otherwise, problems such as poor hand feel, yellowing, and poor washability may occur. By considering the actual application scenarios, clarifying the corresponding relationship between ammonia value levels and effects is the key to precise selection.
In the textile field, the demand for ammonia value varies significantly among different fiber types: polar fibers such as cotton, linen, and synthetic cotton are suitable for an ammonia value of around 6 mmol/g, which can enhance the binding force with the fiber hydroxyl groups and significantly improve softness; low-polar synthetic fibers such as polyester require an ammonia value of 3 mmol/g combined with methyl-terminated silicone oil, which can significantly reduce the friction coefficient and improve smoothness; silk fabrics need to strictly control the ammonia value at around 3 mmol/g and pair it with a smoothing agent, which can not only ensure the hand feel but also retain the natural luster.
From the perspective of risk control, the higher the ammonia value, the greater the risk of yellowing. When the ammonia value exceeds 6 mmol/g, the yellowing phenomenon will significantly intensify after high-temperature heat treatment. Therefore, white and light-colored fabrics should use products with a low ammonia value of ≤ 0.4 mmol/g and pair them with antioxidants; for dark and thick fabrics, an ammonia value of 6 to 0.8 mmol/g can be selected to balance softness and coverage. In addition, the ammonia value needs to be coordinated with viscosity to achieve the best effect. For example, viscose fibers require an ammonia value of 6 mmol/g combined with a viscosity of 1500-2500 cP to achieve good penetration.