Non-aqueous inks having an electric conductivity of at least 10.sup.-4 Ohm.sup.-1 cm.sup.-1, a viscosity of at most 5 cP at 20.degree. C. and in which the liquid medium consists completely or predominantly of one or more solvents having each an evaporation index of less than 11 are most useful for the ink-jet recording process in which a jet of ink is ejected from a nozzle by application of pressure and after its breaking up into droplets is modulated according to the information to be recorded. Such inks are particularly useful for writing on non-absorbent surfaces.
An ink for a recording device, particularly for an ink recording device in which the ink is given off by means of pressure in a direction towards the recording carrier by a recorder head, which is spaced from the record member, and in which a vacuum is formed in the ejecting chamber.
Basic rhodamine dyes suitable for use in recording fluids for the ink jet process and for coloring paper stock have the formula ##STR1## where L is C.sub.2 -C.sub.10 -alkylene, R.sup.1, R.sup.2 and R.sup.3 are each independently of the others hydrogen, substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl or C.sub.5 -C.sub.7 -cycloalkyl or R.sup.1 and R.sup.2 together with the nitrogen atom linking them together are a hetero cyclic radical, An.sup..crclbar. is one equivalent of an anion and m and n are each independently of the other 0 or 1.
The present invention relates to a composition and to a method for using it, notably to an edible ink containing acetone and at least one other solvent selected from water, an alkanol and/or an alkyl ester of an alkyl carboxylic acid, and to a method for printing images with the ink compositions using an ink jet printer.
The present invention relates to a composition and to a method for using it, notably to an ink containing an alkyl ester, to synergistic ink compositions containing the ester and a lower alkanol, and to a method for printing images with the ink compositions using an ink jet printer.
