Edge thickness tolerance common is thick-thin in the Middle, which mainly edge cord caused by uneven. Plate to keep, found Leng Ying Xiuping edges after use. Depletion of large deviation, which is one side adhesive paper cloth, too old, too young, or the hot plates high temperature, low temperature, as well as the hot plate caused by tilt. In preparation to the attention of a portion of the cloth with adhesive reverse adjustable to 180 °, pipe staggered import and export, drained Preheat when hot-plate, pipe water, prevent hot-plate temperature is high, the temperature is low, you should often check the hot plate tilted and timely maintenance. Middle thick thickness deviation margin thin, mostly appeared deformed in the Middle for hot plate for a long time. Maintenance the hot plate.