Overstrike ribbon for print wheels

DETAILED DESCRIPTION We claim: 1.
An overstrike ribbon capable of being advance with each printing of a letter between a high velocity printing device and a substrate through a fraction of the character width, said ribbon comprising: a synthetic-resin foil carrier; and a color-transfer layer on said carrier and bonded thereto, said color transfer layer comprising: a synthetic-resin matrix; and a color paste dispersed in said matrix, said color paste comprising: an oil vehicle consisting of a mineral oil containing 25-50% by weight of aromatic-hydrocarbons and 30-40% of the saturated bonded carbon atoms being cycloaliphatically bonded; a coloring pigment distributed in said vehicle; a cationic wetting agent in the form of at least one fatty amine sale of a fatty propylene diamine of the formula R--NH--(CH.
sub.
2).
sub.
3 --NH.
sub.
2, where R is a long-chain fatty acid residue; and a finely divided solid filler with a high specific surface area and a particle size distribution of 0.
2 to 20 microns.
2.
The ribbon defined in claim 1 wherein said filler is selected from the group which consists of diatomaceous earth, precipated silica, active carbon and broken, hollow microspheres and mixtures thereof.
3.
The ribbon defined in claim 1 wherein said matrix is present in said layer in an amount of 8 to 12 parts by weight, said mineral oil contains 25 to 40% aromatics and is present in an amount of 10 to 18 parts by weight, said pigment is present in an amount of 5 to 10 parts by weight, said fatty amine salt is present in an amount of 1 to 5 parts by weight, and said filler is present in an amount of 5 to 10 parts by weight.
4.
A method of making a multiple overstrike ribbon particularly for use with print wheels, which comprises: dispersing 8 to 12% by weight of a matrix-forming synthetic resin, 10 to 18% by weight of a mineral oil containing 25 to 50% aromatic hydrocarbons, 5 to 10% by weight of a carbon black containing pigment, 1 to 5% by weight of a cationic wetting agent in the form of a fatty amine salt of a fatty propylene diamine in the formula R--NH--(CH