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.
What is Zahn viscosity?
The Zahn Cup-Type Viscosimeter is a portable device for quickly measuring the viscosity of such fluids as paint, lacquer, varnish, syrup, creams and oil. Five models are available to measure viscosities for 18 to 1725+ centistokes. The models differ only in the size of the orifice in the bottom of the cup.
What is used to measure viscosity in paint a Zahn cup or a?
2. The Most Basic of Tools: The Efflux Cup. In many print, coating and paint applications viscosity is measured using an "Efflux" cup.
How does Zahn cup measure viscosity?
To determine the viscosity of a liquid, the cup is dipped and completely filled with the substance. After lifting the cup out of the substance the user measures the time until the liquid streaming out of it breaks up, this is the corresponding "efflux time".
What are Zahn seconds?
The viscosity of a liquid measured by this device is expressed in Zahn numbers, that is, the time in seconds required for a definite volume (44ml) of liquid to flow through the viscosimeter.
Who invented the Zahn cup?
The Zahn Cup is produced not only by different suppliers in the United States but also in countries throughout the world such as England, France, Italy, and West Germany. However, The Paul N. Gardner Company is the only licensed producer by the inventor E. A. Zahn. 12.
Are all viscosity cups the same?
There are a variety of viscosity cup sizes and types which will cover different ranges of viscosity. They use the amount of time the material takes to flow through the cup to help you determine the viscosity in centipoise. However a lot of times you may have a thicker coating with a higher viscosity.
How does a viscosity cup work?
https://www.youtube.com/watch?v=_ngGy4Ra02Q
How does Ford cup measure viscosity?
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. The original Ford Cup was based on Imperial (UK) measurement of the aperture. Many other types of flow cups are being used, depending on the industry or region.
How does a viscosity meter work?
In use, liquid is drawn into the upper bulb by suction, then allowed to flow down through the capillary into the lower bulb. Two marks (one above and one below the upper bulb) indicate a known volume. The time taken for the level of the liquid to pass between these marks is proportional to the kinematic viscosity.
What is a Zahn cup test?
A Zahn cup is a device to measure viscosity that is frequently used in the paint and coating industries. It is a field instrument used to check a fluid's viscosity at the job site and is made from stainless steel with a small hole in its bottom center. A Zahn cup is also known as a viscosity cup.