(57) The present invention provides an improved electroerosion recording medium which
comprises, in a preferred embodiment, a non-conductive support 1, a hard, abrasion
resistant layer 2, preferably comprising an organic polymeri matrix containing an
inorganic particulate material, a thin conductive film 3, typically of a metal such
as aluminium, and an abrasion resistant overlayer 4 that comprises a solid conductive
lubricant dispersed in an organotitanium reagent modified polymer system. The described
polymer system comprises a crosslinked polymer formed by interaction of a hydroxyl
group-containing polymer with one or more organo-titanium reagents. The overlayer
is highly adherent to the conductive surface, has a low organic binder content and
provides effective protection against abrasion of the conductive layer and fouling
of a print head during electroerosion printing.
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