Our anti-bogus silk trademarks are made by a kind of special voile which can change into colours of rad yellow green etc. when come across ultraviolet.
Our anti-bogus silk trademarks are made by a kind of special voile which can change into colours of rad yellow green etc. when come across ultraviolet.
防伪丝织商标是用一种特殊纱，织在需要防伪的部位，经紫外线照射后，这些需要防伪的标志和图案可以变成红、黄、绿等各种颜色。