This is not actually bad, it is good. Stain companies make adjustments when they receive shipment of off-standard raw colorants, this insulates the end user from fired variations in color. In this case, they added extra chrome (to the one on the left), the final product produces the same colored black glaze.
Ceramic stains are manufactured powders. They are used as an alternative to employing metal oxide powders and have many advantages.
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