Our company has many times said that we produce alloys that go through complicated multi-level refining and have no analogs in Russia. While draining alloy we use foam-ceramic filters PPI 50 and PPI 60. For nonspecialists we can explain that it is similar to draining an alloy through a brick. According to the information of PolytegMet ltd. the official dealer of the firm «Drachi»(Germany) that produces the best foam-ceramic filters only our company buys such filters. Other firms buy as a rule PPI 20 and sometimes PPI 30. So we dare say statements of most companies claiming they provide high level of refining and consequently high quality of alloys do not correspond to the facts
