Abstract: A continuous inkjet ink composition includes a solvent, fluoropolymer, a fluorosurfactant, and a colorant. A conductivity salt can also be included. A dispersion resin and/or dispersant can also be included. The continuous inkjet ink is suitable for printing on a fluoropolymer substrate, such as poly(tetrafluoroethylene) (PTFE), with an inkjet printer and curing by heating. The ink can be made by mixing together the solvent, fluoropolymer, fluorosurfactant, and colorant, and optionally the conductivity salt, dispersion resin, and/or dispersant and filtering the mixture.