How to reduce paraffin shrinkage?

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wilkas

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I am pouring paraffin and Vybar mix into 6,5 cm cylinder glass mould. As you can see from the picture below, a very deep shrinkage well does form (whole chilli fits inside). What are the techniques (like mould pre-heat, pre-cool, pour temperature and etc) or additives do reduce this shrinkage without making wax blend not suitable for moulded candles?


 

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