Why and How Viscosity is Measured

Viscosity Zahn Cups

Viscosity Overview Viscosity is a measure of a fluid’s resistance to flow. It describes the internal friction of a moving fluid due to its molecular makeup. A high viscosity (thick) fluid resists motion because of high internal friction, while a low viscosity (thin) fluid flows readily because of low internal friction. Viscosity is measured because […]

Aqueous Coatings: Storing, Handling & Using

Aqueous Coatings

Opening Aqueous Coatings Aqueous coatings may be thermoplastic or thermoset, emulsion or solution polymer blends. The major volatile component is water along with small percentages of other volatile items. Some of these, such as ammonia or amine can evaporate and accumulate in the headspace of a sealed container, therefore opening is best done in a […]

Aqueous Coatings & Foaming

Aqueous Foam

Aqueous coatings are complex blends that may have foaming issues.  Here are some ways to control foaming. Aqueous coatings are complex blends with the typical formula consisting of styrene/acrylic co-polymers, amines, water, plasticizer, waxes, surfactant, and an anti-foamer. The balance of each material portion to the total is important and enables a given target performance […]

What Is It About Viscosity?

Water Viscosity

What is Viscosity? Viscosity tells us how thick or thin a liquid is. Viscosity is the property of a fluid that causes it not to flow easily because of the resistance of its molecules. When we use coatings, we need to understand viscosity, because it is key to accurate application, and a finished coated product […]