Abstract: A composition of matter, useful in the production of organic photoconductor devices, comprising a dispersion of X-form metal-free phthalocyanine in an organic liquid containing an effective amount of a dispersant.

Abstract: The invention relates to:(A) A thermal transfer printing sheet comprising a substrate having a coating comprising either,(i) a dye of the formula: ##STR1## wherein R.sup.1 is C.sub.5-12 -alkyl;R.sup.2 is H or C.sub.1-12 -alkyl; and Rings A & B are optionally substituted in the free positions by non-ionic groups; or(ii) a mixture of at least two dyes of the formula: ##STR2## wherein R.sup.3 is H or C.sub.1-12 -alkyl;R.sup.4 is H or C.sub.1-4 -alkyl; and Rings A & B are optionally substituted in the free positions by non-ionic groups;provided that in at least one component R.sup.3 is C.sub.5-12 -alkyl and in at least one other component R.sup.3 is H or C.sub.1-4 -alkyl;(B) A thermal transfer printing process using the transfer sheets; and(C) The mixture of dyes defined in (A)(ii).

Abstract: An aqueous dispersion of a solid, especially a disperse dyestuff or a pigment, containing, as dispersing agent, a water-soluble, non-ionic polycyclic aromatic compound having a poly(lower alkylene-oxy)chain containing from 5 to 30 lower alkylene-oxy groups. Preferred dispersing agents contain about 10 ethylene-oxy groups in the chain. The dispersions of disperse dyestuffs are especially suitable for use in aqueous print pastes based on synthetic thickening agents and the pigment dispersions are suitable for use in emulsion paints.