Steel doors and windows because of its unique formula and has good corrosion resistance, corrosion resistance, followed by steel window depending on hardware, the hardware under normal circumstances as metal products, and industry-corrosive environments, such as food, medicine, health, chemicals and coastal areas, rainy wet areas, use corrosion resistant metal parts (plastic) plastic doors and windows, which is 10 times the life of steel doors and windows. Steel doors and windows to tell whether the toxic ways: First, look at the product color. Toxic color white steel doors and steel doors and windows built, although white, but gives an intuitive feel "stunned" that was dark blue or white in transparent, clean feeling very strong steel doors and windows, after a period of time due to atmospheric sulfur and sulfide pollution gradually grayish black. Non-toxic plastic pure color, like ivory, crystal clear and smooth feeling soft, penetrate into the inside feeling, by the atmospheric sulfur and sulfur pollution is not grayish black. Second, look at the results. Lead salt in the day light and heat, steel doors and steel doors and windows-style long-term effects, surface lead dust can cause lead poisoning and lead contamination. After lead enters the body, except in part through feces, sweat discharge, most precipitation in the bone marrow, melting into the bloodstream, damage to bone marrow hematopoietic system, brain and urinary systems and reproductive organs. Lead can also hinder the synthesis of human blood, leading to anemia, headache, dizziness, fatigue, drowsiness, constipation and limb pain and other symptoms. Organic tin steel doors will not have the symptoms. Gorgeous windows and doors, steel doors [style], steel doors and windows provided by Ramada. Search for "Shijiazhuang sun room, bridge aluminum doors and windows, shower room, glass partition" reliable supplier network operators choose to have the whole alliance certification: Shijiazhuang gorgeous Door (www.sjzygf.com), trustworthiness and reliability, now "Business League Support" page click on the live chat with us now!