Gift notepad cover currently available mainly leather-based, but the leather is good or bad largely determine the quality of the gift notepad and price, so we know for leather raw materials becomes particularly important, let's understand the next Leather and Leather knowledge in this regard. First, we all know that leather from the point of view are not rules shape, thickness and extent is not very average, but how many there are some gaps in the leather surface smoothness is not the same side of the abdomen in general will be some relaxation compared to the like, but leather leather It will be relatively smooth surface, compared with the average thickness will be like. But for the gift Notepad, the area is not very good to see small and other reasons, we can see the appearance, texture, disability, the analysis is not leather, from the cut surface look to see is not the thickness of the fibers is not a difference. Then we can also gift notepad dripping testing, inspection is not leather, elastic tension can also be tested. This article Source: http: //www.edaoyin.cn/article/industry-1264-1.html more: http: //www.edaoyin.cn/ More: gift notepad http://www.edaoyin.cn /aboutus/index.html Related Recommended: Shanghai Shanghai construction site www.haohead.net printing www.sh133.cn