We strongly advise our customers to design their label artwork in CMYK. Why? After printing, the labels will be exposed to high temperatures (180 degrees Celsius) to dry them. Any moisture left in the paper can cause imperfections. We therefore bake them in a special label oven for almost an hour and a half. After that they are pressed onto the record, using the same high temperature of approximately 180 degrees. Some pantone colours tend to change colour during this process, especially colours with a high white percentage (> 50 %) and metallic colours. Another good reason to supply your label artwork in CMYK: it's a lot cheaper than printing in pantones.