Disposable ball-point pen writes on glass, metal, porcelain, wood, paper, cloth and plastic (including Teflon®). The pen operates down to 0°C and the ink resists temperatures to 250°C (482°F). Dry ink resists washing, weathering, acids, alkalies and is unaffected by freezer temperatures. Marks are easily removed by hydrocarbons such as xylene or toluene.