No, shrinkage will not occur with ArtResin. Shrinkage occurs in many epoxy resins because of they are formulated with solvents, non-reactive diluents or cheap fillers. These materials come up out of the product and are released as VOC's during the curing process. Since ArtResin does not contain solvents, non-reactive diluents or cheap fillers, it means shrinkage is not an issue.
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ArtResin: Made For Artists, By Artists!