An air-bag arrangement is disclosed, which preferably takes the form of an inflatable curtain. The template component includes at least one substantially arcuate-shaped stencil to facilitate a curved incision marking or curved incision on the breast. The watermark generating unit performs mask processing on an outer-region pattern, and generates an outer-region image by performing second image processing on an outer image in the region. In addition, the invention provides kits for carrying out such methods. The two sets of rotatable packing rings are caused to rotate. to form a pyrrolidone, wherein the percent yield of the pyrrolidone is at least about 50%.