Calculating the specific gravity of a glaze is important if you want consistent results. The standard method uses a 100ml_ graduated cylinder to measure and weigh the same volumes of glaze and water. But let's be honest, it's a pain to clean and dry a graduated cylinder if you have to adjust the glaze you are working on or if you are planning to check a few buckets of glaze at a time. Not to mention the added difficulty if you are using a glass cylinder, which is fragile and very easy to break.
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