Writes on all plastic, glass, metal, wool, paper and cloth, including "PTFE", fluoropolymer resins. With its precision seal valve the pens life is preserved and as well it allows for a smooth flow of ink even if it's left uncapped. Once dry, the solvent base ink is temperature resistant from 0°C to 155°C (32°F to 310°F)
Markings are insoluble in water or hydrocarbons, resists many solvents, and are easily removed with alcohol.