MARKER DEVICE WITH PERMANENT INDICIA

摘要

Permanent indicia can be applied to a surface comprising a composition comprising about 35 to about 75 % of a polymeric component having dispersed therein about 25 to about 65 % of a filler component comprising: (i) about 2 to about 65 % of an insoluble, infusible particulate, active filler having a mean particle size less than about 2.5 micron and a surface area greater than about 10 m<2>/g; and (ii) up to about 63 % of an insoluble, infusible, particulate, inert filler. The polymeric component should be polar, e.g. by the use of a polymer containing polar groups or adding a polar additive to the composition.