Abstract: An inking ribbon cartridge for printers having two rollers between which a flexible film ribbon is drivingly engaged. The rollers are provided on their outer faces with a friction material, with the hardness of the friction material on the roller in contact with the inked face of the ribbon being higher than that of the friction material in contact with the other face of the ribbon. The friction material may be formed by a synthetic material such that the ratio between the hardnesses of the friction materials on the two rollers is between a half and two-thirds. The friction material on each of the two rollers may be formed by a polychloroprene such that the Shore hardness of the friction material on the roller in contact with the inked face of the ribbon is between 60 and 110.

Abstract: Readily dispersible pigment concentrate compositions are disclosed which can be easily dispersed in water, solvents and oils. The pigment compositions comprise 5 to 75% by weight of organic or inorganic pigment, 15 to 70% by weight of a solvent or mixture of solvents miscible with water and 7 to 35% by weight of a dispersing agent or mixture thereof. The dispersing agent is an addition product of ethylene oxide and castor oil, or an addition product of ethylene oxide and para-nonylphenol or an addition product of ethylene oxide and a fatty alcohol and mixtures of such dispersing agents.The pigment compositions can be incorporated into natural or synthetic resin compositions and, for example, are suited for leather-finishing compositions when mixed with proteinaceous or nitrocellulose film-forming materials.