This pin is a hand-painted pottery. It is biscuit-fired at 800 degrees, the painted glaze is fired at 1230 degrees, and finally the golden part of the golden water glaze (including 11% gold) is put into the kiln to be individually burned to 700 degrees. It needs to go through the kiln firing stage three times, and because the work is small, it is not easy to paint. Basically, it needs to be outlined slowly with the smallest pen, for those who like the beauty of handwork and functionality! Pin material is brass and gold plated This pottery diffuser is hand-glazed with the finest pen and then fired with a high-temperature glaze above 1200˚C, so there is no need to worry about fading.