Ultramarine xiav (xim xiav 29) yog xim xiav inorganic nrog ntau siv.Nyob rau hauv cov nqe lus ntawm cov xim, nws yog siv nyob rau hauv xiav xim, roj hmab, number case, thiab tarpaulin;Nyob rau hauv cov nqe lus ntawm whitening, nws yog siv nyob rau hauv papermaking, xab npum thiab ntxuav hmoov, starch, thiab textile khoom.