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Expert's Corner — temperature

Using a Viscosity Cup

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Using a Viscosity Cup

Finishes vary in viscosity (thickness in liquid form) depending on their type and formulation, and especially in temperature differences. The viscosity is thicker when the finish is cold and thinner when the finish is warm. To measure viscosity dip a viscosity cup into a finish so the cup is full. Then lift the cup out of the finish and begin timing the drainage with a stopwatch. When the stream breaks, indicating that the cup is empty, stop the timer. The number of seconds is the measure of the viscosity. There are many types of viscosity cups. Some are quite expensive....

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Viscosity, Finish Thickness, and the Magic of the Wet Mil Gauge

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Pro finishing shops maintain tight controls. Temperature, humidity, finish viscosity, air pressure, fluid volume, spray patterns – it’s a lot of factors that have to work together to produce the perfect finish, and measurement and control are the only ways to ensure a top quality result. We tend to be a little more loosey-goosey in home shops. Controlling temperature can be a challenge in itself; as for humidity, we’re pretty much at the mercy of the elements. And while we may have to accept what Nature does, there are many elements of spray finishing that we can – and should...

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