The materials used with high purity enable products to resist chemical corrosion and withstand sharp change in temperature.Glazed utensils work satisfactorily at temperatures up to 1050℃, and unglazed up to 1350℃. Both of them meet requirements aquired by chemical and physical analysis. Over 20 kinds of porcelain laboratory utensils are being produced by uswhich include crucibles, basins, mortars, funnels, combustion boats and tubes,spotting platesdesiccating disc and so on. Some 300 specifications will cover all purposes of customers. Each piece of product passes strict inspecting in accordance with the standard of SY-3302-83 issued by the Petroleum Industry Ministry before being brought to be market.