An impressioning plate useful for creating aesthetically pleasing impressions in previously-cooked products; a process for creating the impressions and an improved previously-cooked product formed thereby. Oxygen and a silicon etchant are introduced into a plasma etching chamber containing a silicon substrate. Caulking portions provided at upper and lower ends of the connecting chamber receive and hold the piston pin, thus engaging the piston, piston pin, connecting rod, and crankshaft. The printing system also includes at least one roller for each tension zone. Preferably, a kit is provided including instructions, a template for cutting away a portion of the window screen at a desired location, and the viewing device. One or more seals on the spool can slide across surfaces of the stacked rings in movement of the spool to different positions corresponding to different states of the valve.