Provided is a ferritic stainless steel excellent in terms of thermal fatigue resistance, high-temperature fatigue resistance and oxidation resistance without adding Mo or W, which is an expensive chemical element and with controlling Nb content to be as small as possible. In particular, the invention relates to systems, devices, and methods enabling treatment of wounds with liquid, gas, or particles in a non-controlled setting while providing containment of contaminated liquid, gas or particles, thereby preventing exposure of individuals and surfaces in proximity to the patient to infectious materials. The method includes the step of excluding print tone data corresponding with the ejection of a single-droplet drop from being provided to the grayscale print head.