I have been making bells using traditional loam mould for some time I have made around 20 bells all with relative success. The last batch looked fantastic when cast but on fettling I discovered they are all riddled with porosity. Does anyone have any suggestions what I may have done wrong this time?
Here is some pic of how I do the process Vin's Bells

bells6.jpgIMG_20211012_115150.jpg
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