If you mean the laser engraving on the glass bottle of the wine bottle, because the bottom material has been engraved, the mark will not change color, and the engraving on the packaging of the private tailor wine may also be laser engraving, which will not change color. I watched the video before and saw the processing process of Zhuokete laser engraving machine, which was super fast and dazzling. I don't know if I know.

Let's see what others say.