In terms of color coating production growth, nearly eight years of data from the perspective of overall showing irregular "M" shape. 2005-2007, the growth rate continued to show momentum enlarge Baosteel color coated, which in 2007 the growth rate as high as 30.58%. The main reason is that Shandong color-coated, in the case of profit margins and earnings at the high water of the average, while easing the financial situation and lower demand for heavy volume increases, leading steel and private domestic steel production favors high, and also that there is a new can yield a large number of the release. In 2008-2009, the rapid decline in output growth, which in 2009 growth rate of only 3.96%, down nearly twenty by seven percent compared to 2007. 2008 was mainly affected by the international financial crisis, commodity markets generally under pressure, the domestic steel market weakness filling, painted domestic manufacturers of domestic trade are facing enormous challenges, poor production initiative. 2010-2011, boosted by the country "four trillion" investment caitu enterprises, especially private enterprises mushroomed like color coated Buying appeared, leading up onto the growth path again, and hit a nearly eight in 2011 the highest in years, reaching 33.46%. 2012-2013, "four trillion" aura began to recede, the domestic color coated coil supply and demand increased, while the homogenization of competition, production growth is slowing down. 2013 annual production of 7.534 million tons of which, compared with 263,000 tons in 2012 reduction, the chain down 3.37%. In this paper, the actual production on the thick edge coating color coating production prone to thickening analyzed color-coated, and in many ways made the appropriate preventive measures. 1. The edge thickness phenomenon ???? in caitu production process, there strip edge portion (typically less than 1mm wide) coating thickness is slightly higher than the other portions of the phenomenon and accompanied by fine bubbles, typically called edge thickening. Theoretically, the production process in the color-coated edge thickening phenomenon is inevitable. Typically since the coating is thin (monolayer thickness not exceeding 18 ?? m), edge thickness is not obvious, it will not affect the use of the product. Huaiyin color coated, color-coated crown states, Jinhong Run steel (certified merchants) provided by Boxing Xingfu Town 金宏润 Steel Industry and Trade Ministry. Boxing Xingfu Town Jinhong Run Steel Industry and Trade Ministry (www.bxjhr.com) (www.bxjhr.com) on board (with) wood in this area devoted boundless enthusiasm and passion, Jinhong Run Steel has been a customer Center for customers to create the concept of value, quality and service to win the market, and sincerely hope to cooperate with the community to create success, create brilliant. Welcome to the relevant business information, contact: Mr. Wang. You can also access (www.bxjhr.com/supply_details_49096350.html), for more information about the company.