Silicate crayons, for use on hard substrates such as concrete or coarse plaster, contain added lime to increase hardness and reduce wear

摘要

Silicate crayons, containing added lime, are new. The silicate crayon, described in DE Application No. 19601585.5 (29.1.99), contains a further component of lime in the wet from (slaked lime suspension) or in the dry form (hydrated lime powder). An Independent claim is also included for a mixture of potassium waterglass and lime as a modified binder.