What is a viscosity cup used for?

Four Paint Viscosity Cup is used for measuring the viscosity of paints and finishes to ensure a flawless finish. The SG243 is compatible with all Earlex Spray Station models. For the best possible finish, it’s important to use a material with the correct viscosity for your paint sprayer.

What are the different types of viscosity cup?

The various forms of viscosity cups use gravity to allow a fluid to flow through an orifice located at the bottom in a precise amount, which can be measured over time to calculate a viscosity value. The most common viscosity cups are Ford, Ford Dip, and Zahn cups.

What is viscosity measuring cup?

The Ford viscosity cup is a simple gravity device that permits the timed flow of a known volume of liquid passing through an orifice located at the bottom. To determine the viscosity of a liquid, the cup is dipped and completely filled with the substance.

How the viscosity is measured?

Viscosity can also be measured by applying oscillating vibrations to the sample and monitoring the damping effects of the fluid. These can be assessed by monitoring power input, the decay time of oscillations, or changes in the resonated frequency.

What causes higher viscosity?

Viscosity generally increases as the temperature decreases. The viscosity of a liquid is related to the ease with which the molecules can move with respect to one another. Thus the viscosity of a liquid depends on the: strength of attractive forces between molecules, which depend on their composition, size, and shape.

How do you test for viscosity?

Ways to Measure Viscosity

1. Capillary Viscometer. The earliest methods for measuring viscosity were based on using capillary tubes and measuring the time it took for a volume of liquid to pass through the length of the tube.
2. Zahn Cup.
3. Falling Sphere Viscometer.
4. Vibrational Viscometer.
5. Rotational Viscometer.

Which is the best cup to measure viscosity?

If you intend to measure the viscosity of organic coatings, you will want to purchase a Zahn #2 and/or a Zahn #3 viscosity cup. The Zahn #2 cup is intended for coatings that have a relatively low viscosity, generally in the range of 18 – 35 seconds.

When to use a Zahn cup for viscosity measurement?

The Zahn #2 cup is intended for coatings that have a relatively low viscosity, generally in the range of 18 – 35 seconds. For high solids coatings you might find that the Zahn #2 cup is too insensitive and that viscosity measurements go well above 35 seconds. I have measured coatings with a Zahn #2 measurement well in excess of 1 minute.

How do you measure viscosity of organic coating?

Using the long handle that is brazed onto the cup, you immerse the cup into your paint or organic coating. As you lift the cup vertically out of the coating you start a stop watch and measure the time it takes for the coating to drain. You stop the watch immediately the paint stream breaks.

What’s the maximum drain time for a viscosity cup?

Below the 1.5 limit the measure is primarily turbulence at the orifice rather than viscosity. Below 10 seconds, errors in measuring drain time become too great. The maximum drain seconds recommended is 60.