... . We are ISO9001-2000 certified company. DuraTight carbon additive has earned its reputation for high carbon absorption rate and is welcomed by customers ... Japan, Korea, India, USA, Italy etc.Duratight carbon Additive has the features of high carbon,low sulphur,nitrogen and harmful impurities. So it ... %0.50%0.3-5mm 0.03%DT-CA-1893-95%0.05%3.50%1.50%1-3%1-10mm ...