Testing viscosity using glass plate
![testing viscosity using glass plate testing viscosity using glass plate](https://dm0qx8t0i9gc9.cloudfront.net/thumbnails/video/4jOZllRYeika4i2md/four-tubes-are-filled-with-oils-with-different-viscosity-a-metal-ball-is-being-lowered-in-the-tubes-the-lower-the-viscosity-the-faster-the-object-falls_hw5eon9r_thumbnail-1080_01.png)
All the calculating is done by the instrument. Viscosity is measured by looking at the force required to spin a plate through the fluid. In the cosmetic industry the overwhelming instrument of choice for measuring viscosity is the Brookfield Viscometer.
![testing viscosity using glass plate testing viscosity using glass plate](https://media.noria.com/sites/magazine_images/201308/Bennett_U_Shaped_Viscosity.jpg)
But basically you measure viscosity to ensure your product is of consisten quality and that it remains stable.
![testing viscosity using glass plate testing viscosity using glass plate](https://equilabcanada.com/ke/images/viscosity.jpg)
We’ve previously writte about fluid viscosity and I would encourage you to read that to get up to speed on what it is and why you would want to measure it. Viscosity is one of those terms that wasn’t covered much in college but tends to be used a lot in the cosmetic industry. It turns out there are a variety of choices. This reader wanted to know whether they needed an “expensive” Brookfield viscometer or whether they could take viscosity readings another way. There was a question on one of the cosmetic science forums I subscribe to about viscosity.