The present invention relates to a multifunctional clay composition which can be used as a clay capable of performing various functions before drying and which can be used as writing instruments similar to crayons, pastels or colored pencils after drying, and to a process for preparing the same. The multifunctional clay composition may comprise an extender material; a binder; a multifunctional crosslinking agent including a compound having a hydroxyl group of two or more functionality, or forming an ion having a hydroxyl group of two or more functionality in a water solvent; a wax and a pigment.

In a pencil lead manufactured through a baking step regardless of being a black lead or a colored lead, the mechanical strength of the pencil lead is further increased by coating a surface thereof with a resin. A pencil lead includes a baked lead body whose surface is covered by a covering layer made of resin that has a scratch hardness of HB or greater. The scratch hardness of the resin as a subject resin is defined as a lowest hardness index of a tester pencil that is able to form an indentation on a surface of a horizontal flat plate coated with a 5-m thick film of the subject resin, when the surface is scratched by the tester pencil being pressed onto the surface at an angle of 45 with a load of 7.355 N.

In a pencil lead manufactured through a baking step regardless of being a black lead or a colored lead, the mechanical strength of the pencil lead is further increased by coating a surface thereof with a resin. A pencil lead includes a baked lead body whose surface is covered by a covering layer made of resin that has a scratch hardness of HB or greater. The scratch hardness of the resin as a subject resin is defined as a lowest hardness index of a tester pencil that is able to form an indentation on a surface of a horizontal flat plate coated with a 5-m thick film of the subject resin, when the surface is scratched by the tester pencil being pressed onto the surface at an angle of 45 with a load of 7.355 N.

An erasable soluble graphite ink composition that may be adapted to an existing dauber applicator, resembling a writing instrument such as a pen or pencil. When applied by the dauber to a writing surface, provides for a machine-readable pattern. The dauber, when filled and utilized with the present composition and its alternate embodiments, allows for the rapid filling of apertures in one motion of the dauber, versus repetitive circling when using a conventional pencil. Such filling is viewed as saving between three to five times (3?-5?) the amount of time and is considered advantageous during usage in situations where time saving is a critical factor. Once applied to the writing surface, the composition may be erased using a standard pencil eraser, and remarked such that only the revised mark is read by the machine reader.

An erasable soluble graphite ink composition that may be adapted to an existing dauber applicator, resembling a writing instrument such as a pen or pencil. When applied by the dauber to a writing surface, provides for a machine-readable pattern. The dauber, when filled and utilized with the present composition and its alternate embodiments, allows for the rapid filling of apertures in one motion of the dauber, versus repetitive circling when using a conventional pencil. Such filling is viewed as saving between three to five times (3?-5?) the amount of time and is considered advantageous during usage in situations where time saving is a critical factor. Once applied to the writing surface, the composition may be erased using a standard pencil eraser, and remarked such that only the revised mark is read by the machine reader.

A writing instrument for primary use within carpentry a body that extends from a distal end to a proximal end having a marking tip. The body has a substantially round cross-sectional shape and the marking tip is offset from a center of the cross-sectional shape. The round shape can non-uniform, such as ovular or egg-shaped with the marking tip offset from the center of at least the length or the width thereof. The offset positioning of the marking tip relative to the outer surface of the body provides clearance to scribe a building material.

A writing instrument for primary use within carpentry a body that extends from a distal end to a proximal end having a marking tip. The body has a substantially round cross-sectional shape and the marking tip is offset from a center of the cross-sectional shape. The round shape can non-uniform, such as ovular or egg-shaped with the marking tip offset from the center of at least the length or the width thereof. The offset positioning of the marking tip relative to the outer surface of the body provides clearance to scribe a building material.

A pencil for applying a coloring and/or cosmetic substance, having a pigment core composed of the substance that is to be applied and a one-piece injection-molded casing encompassing the pigment core that is composed of a thermoplastic material that consists of a mix of a first plastic phase and a second plastic phase, wherein the casing, respectively viewed in the radial direction, has an outer enrichment zone with a higher concentration of the first plastic phase than in the middle region and the casing, respectively viewed in the radial direction, has an inner enrichment zone with a higher concentration of the first plastic phase than in the middle region.

A pencil for applying a coloring and/or cosmetic substance, having a pigment core composed of the substance that is to be applied and a one-piece injection-molded casing encompassing the pigment core that is composed of a thermoplastic material that consists of a mix of a first plastic phase and a second plastic phase, wherein the casing, respectively viewed in the radial direction, has an outer enrichment zone with a higher concentration of the first plastic phase than in the middle region and the casing, respectively viewed in the radial direction, has an inner enrichment zone with a higher concentration of the first plastic phase than in the middle region.

The present invention thus relates to a writing or color pencil comprising the following 3 layers obtained by coextrusion a polyolefin-based non-expanded lead, a non-expanded protective intermediate layer surrounding the lead and comprising a mixture of polystyrene and EVA, and an expanded synthetic wood material based on a styrene polymer surrounding the protective intermediate layer, the protective intermediate layer thickness/lead radius ratio being between 0.05 and 0.17, advantageously between 0.07 and 0.15.