For brass material, it could have black stain naturally if you don't use it that often but it could be cleaned up as well. Brass, people have been thinking it is one material strong for usage since Bronze age till now. Even the land of smile, Thailand in the past, Brass pan is one of famous kitchen utensil good for cooking and keep heating some kind of food from time to time without burning yet still keeping a good look for it. For general, 6", 7", 8" are counted as small size suitable for home serving or restaurant table serving. Popular for so-called Thai food which needs to be heated all the time dining or keeping, hot Shabu, meat steam, noodles with soup, red curry, green curry, coconut soup or anything that requires heat all the time for the taste of food and meat soften. Moreover, this brass pan can be applied usage for procedure of making traditional Thai dessert because most of Thai dessert contains coconut milk as main ingredient and said coconut milk requires great heating of coconut milk itself with sugar and little salt, or some more others for well mix. That is why brass pan is still important for these factors. There is more size, please see more on our store front Thai Threshold.