These inks are furnished in concentrated form. The concentrated ink may be used as is or diluted with a mineral spirit solvent in the range of 20% solvent to 80% ink. Diluents can be supplied with the ink or purchased from a local supplier. Diluents should be mixed very thoroughly with the concentrates. Intense mixing for at least 10 to 15 minutes with a high speed mixer is requires to carry out this dilution.