It is important when using a Ford Cup and when retesting liquids that the temperature of the cup and the liquid is maintained, as ambient temperature makes a significant difference to viscosity and thus flow rate. However, the conditions in a simple flow cup are seldom ideal for making true measurements of viscosity. is measured with a viscosity cup by pouring a given amount into the viscosity cup and then running out of the hole at the bottom of the. Under ideal conditions, this rate of flow would be proportional to the kinematic viscosity (expressed in stokes and centistokes) that is dependent upon the specific gravity of the draining liquid. 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. JSTOR ( July 2023) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Ford viscosity cup" – news Please help improve this article by adding citations to reliable sources. Determines viscosity of paint, lacquers and related coatings - cup-orifice combination is selected to provide an efflux time within the 20-100 second range. By doing this you can be better prepared to select a viscosity cup and achieve more consistent better results from your painting.This article does not cite any sources. Using a viscosity cup for painting can drastically simplify and improve your painting but you need to know the right cup to choose for your coatings, how to use it properly, and to write down the settings on the viscosity cup and your paints. With the viscosity written down and the equipment settings adjusted you will have a repeatable formula to achieving a paint finish. If you are unable to achieve the desired finish, try to see if your viscosity is to high (the paint is to thick) and add thinner as indicated on the technical sheet. With the viscosity range written down you then begin setting your paint application equipment to achieve the proper appearing finish you want. Once you know the desired ranges you can add thinner until the coating is within the desired viscosity range.Īfter confirming the coating is properly thinned you would then right down the time the material took to begin breaking the fluid stream and this would give you your viscosity. Once you have selected a viscosity cup the next thing is to know the desired viscosity ranges of your coatings. From this type of chart you can see that Ford 4 Cups cover one of the greatest ranges of viscosities. You can then consider a viscosity cup conversion chart that shows the range of viscosities a particular cup can measure. To select a viscosity cup that will match the needs of your painting you can check the coating data sheets for your coatings and see if a cup is referenced. However a lot of times you may have a thicker coating with a higher viscosity. For spraying paint with a spray gun paint running between 15 – 30 seconds in a Zahn 2 Cup is ideal. 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. They use the amount of time the material takes to flow through the cup to help you determine the viscosity in centipoise. There are a variety of viscosity cup sizes and types which will cover different ranges of viscosity. What You Need to Know When Selecting a Coating Viscosity Cup You can learn about other helpful ideas to help reduce errors in your manufacturing paint process here. cup, accurate viscosity values can be determined. In fact if you are having a lot of inconsistencies in your paint process, especially if you’re a manufacturer a viscosity cup can help reduce the issues you are having by providing a standard process for your painting. Measure viscosity in 60 seconds or less using these ZAHN VISCOSITY CUPS. Additionally knowing the viscosity of your paint allows you to have a reference range so you can select equipment settings that will let you achieve a consistent result when painting. Whether your spraying wood finishes, industrial enamels, or anything in between a paint viscosity cup allows you to know just how thin your paint is. Viscosity cups like Ford and Zahn Cups are handy tools at as a painter.
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