See this little tool, the Deep Throat Dial Caliper?!  This handy little tool will help you measure the thickness of your enamel around the entire surface of your piece.  It’s very important for the thickness of the counter enamel to match the thickness of the top enamels, or you run the risk of cracking.  So, go on over to Contenti Tools and purchase yourself a pair.  Here is the link for the tool:  http://contenti.com/measuring-n-testing/calipers-n-sliding-gauges/deep-throat-dial-caliper

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Enameling Polishing Tools