Color lead for a writing device, drawing device or painting device
AssigneeJ.S. Staedtler GmbH & Co. KG
InventorAndreas Thies
Life of this patent
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Abstract
An unburnt color lead for writing devices, drawing devices and painting devices, includes at least one coloring material, at least one binder, at least one organic lubricant which is solid at room temperature, and at least one filler material whose particles essentially have a disk-shaped configuration. The color lead contains 20 to 80 weight % of the at least one filler material, and the color lead contains at least 20 weight % hexagonal bornitride as a first filler material.
Claims5
An unburnt color lead for writing devices, drawing devices and painting devices, the color lead comprising at least one chromophoric agent, at least one binder, at least one organic lubricant which is solid at room temperature, and at least one filler material whose particles are mainly disk-shaped, wherein the color lead contains 30 to 80 weight % of the at least one filler material, and wherein the at least one filler material is hexagonal bornitride.
Dependencies are inferred from the claim text.