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Shear-Thinning Coatings: Why Pouring Behaviour Is Not a Fixed Number
A shear-thinning material's apparent viscosity changes with shear rate. A single informal pouring observation does not fully characterize that behaviour.
Updated · NANOLAB Knowledge
Practical approach
Use an appropriate defined method and record the conditions relevant to the process being evaluated.
Behaviour while resting in a container can differ from behaviour during dispensing or application.
Decision limits
Do not assume every coating is shear-thinning, or use that term to excuse an unexplained change. Confirm the formulation's expected behaviour.
Related guidance
- Coating Viscosity: Why a Thicker Liquid Does Not Prove a Thicker Protective Film
- Waterborne Is Not the Same as Water-Soluble: Understanding Coating Descriptions
- Gloss Units Are Not a Percentage of Shine
- Quartz Coating Versus Quartz Countertop Sealer: Avoid the Naming Trap
Method reference: AMETEK Brookfield: viscometer principles. References describe their stated methods or products; they do not certify NANOLAB products or establish compatibility with an unlisted surface.
Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.
Continue reading
Coating Viscosity: Why a Thicker Liquid Does Not Prove a Thicker Protective Film
Understand what coating viscosity reveals about application, which test conditions matter, and why liquid thickness does not prove film protection.
Waterborne Is Not the Same as Water-Soluble: Understanding Coating Descriptions
Learn why a waterborne coating is not necessarily water-soluble after curing, and which documentation matters for application and maintenance.
Gloss Units Are Not a Percentage of Shine
Gloss units are a reference-based measurement scale, not a universal percentage of shine. Interpretation also depends on measurement geometry.