A process for the production of pigment-bearing and/or effect
substance-bearing leads, comprising the following steps: a) pigments
and/or effect substances are at least partially mixed with a fluid
wetting agent so that a kneadable material is produced, b) further
ingredients and optionally remaining pigments and/or effect substances
are added and the resulting material optionally homogenised, c) the
material obtained in b) is extruded to afford extrusions of predetermined
diameter, and d) the extruded portions are dried to a constant weight
optionally after adjustment of the extrusion length.