Page 17 - Demo
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steel funnel with a long handle. You dip the cup into a liquid and use a stop watch to measure the time it takes for the liquid to drain out. They come in different sizes for measuring different ranges of viscosity.
In the work described here, we used the Norcross Shell cup #6.
Though appropriate for scienti c study, the shell
Figure 3
cup is likely too expensive for most soapmakers. Fortunately, I developed the poor soapmaker’s viscometer, consisting of a disposable graduated plastic transfer pipet, as shown in Figure 2. These are like medicine droppers except that the bulb is molded to the spout. They come in different sizes, but we found that one with a capacity of 3 mL. WholesaleSuppliesPlus.com carries plastic droppers in a pack of (50) for a price of $4.95. Similar products from other vendors should work as long as they are capable of measuring 1 mL.
To use the poor soapmaker’s viscometer, simply squeeze the bulb, insert the tip into the liquid, and start a stop watch as soon as you release the bulb. Stop the watch when the liquid level reaches the 1 mL mark. The more viscous the liquid, the longer it will take to reach the mark. Ideally, you would use the viscometer on liquids
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