The dice are laser engraved. We don't fill the engraving over the dice. Around the opaque dice, the laser engraving system leaves the engraved region "white". The translucent dice keep translucent from the engraved location. As you could see from the picture a number of the colours get the job https://10piecediceset27258.laowaiblog.com/14658574/about-7-piece-dice-set