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Some manufacturers produce pans with impressions designed into the exterior base in order to spread heat more evenly through the pan and prevent warpage. Bottom stamping treatments can reduce warpage slightly and marginally improve heat distribution. However, these additions are minor improvements when compared to a flat base pan of similar thickness. The primary factor in even heat dispersion and preventing warpage is the pan's thickness. Burning hot spots and warpage occur when a pan becomes overheated. Any pan, regardless of bottom impressions, will not distribute heat or reduce warpage as well as a pan with a heavier gauge.