Modified starch viscosity can rise, fall, or remain relatively stable after pH adjustment. The outcome depends on the starch chemistry, processing history, and complete cosmetic formulation.
For technical evaluators selecting Modified Starch for Cosmetics, the key question is whether a specific grade maintains acceptable rheology throughout manufacturing, storage, and intended use.
A viscosity shift after pH adjustment can turn a promising prototype into an unstable formulation. Understanding the cause helps distinguish reversible interactions from permanent polymer damage.
This article explains the mechanisms behind these differences and provides practical evaluation steps for selecting grades, defining processing limits, and verifying stability in your target system.
What should you expect when cosmetic formulation pH changes?
There is no universal relationship between pH and modified starch viscosity. Different modifications change hydration, molecular