A colored lead for writing, drawing and coloring implements, more particularly erasable, sintered colored lead, or to a colored chalk, more particularly erasable, sintered colored chalk, having a sintered lead or chalk base body which is formed from a lead or chalk base material containing at least one binder with a proportion of from 1 to 25% by weight and at least one filler with a proportion of from 25 to 99% by weight. The sintered lead or chalk base body is impregnated with at least one colorant and at least one lubricant.

A method for releasing impurities from a calcium-based mineral is described. The method comprises reacting a calcium-based mineral containing impurities with an aqueous solution of one or more ionic salts at a temperature of approximately 85 C. or above, wherein at least one of the calcium-based mineral and the one or more ionic salts comprises sulphate and at least one of the calcium-based mineral and the one or more ionic salts comprises ammonium, and wherein the concentration of the solution is approximately 25% or higher mass fraction, such that double salt crystals are formed and impurities are released. The method further comprises separating the double salt crystals from the impurities. Various products of the process are also described.

A marker ensemble is provided, having a multi-purpose marking tool and a sharpener.

The marking tool has a shell, retention sleeve, compression spring, control tab, reversible disk holder, and cap. The shell has an exit opening, an access opening with a mounting socket, and a medially located lateral control slot through which the control tab extends. The retention sleeve has a collet, compressed by the compression spring and uncompressed by the control tab. The disk holder has a body with a retention ridge and a pair of lugs extending from each end to retain a marking disk. One marking disk has a circular periphery and the other marking disk has a toothed periphery. The cap is mounted upon either end.

The sharpener includes a blade with a sharpened edge secured to a body with an upper surface, a peripheral surface with a shoulder, waist, and hip, and a lower surface.

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.

A core or crayon for writing and/or coloring has 15 wt % to 30 wt % of a core base material based on fat and on wax, and 40 wt % to 80 wt % of at least one filler, and 0.1 wt % to 30 wt % of at least one colorant. The core base material includes, based on the total mass of the core, 0.5 wt % to 10 wt % of aluminum distearate, 5 wt % to 20 wt % of oxidized polyethylene wax, and 5 wt %-22 wt % of at least one paraffin wax.

A marking device that is supported by a personal mobility vehicle, such as a scooter, is movable from a first position, in which the marking device does not contact the riding surface, and a second position, in which the marking device contacts the riding surface. The marking device includes an attachment portion and a marking portion that creates markings on the riding surface as a result of frictional contact with the riding surface. The marking device can also include an actuation portion which is accessible to the user and allows the user to move the marking device to the second position. In one arrangement, the marking device includes an elastic marking member which is configured to bend in order to maintain contact with the riding surface.

A colored lead for writing, drawing and coloring implements, more particularly erasable, sintered colored lead, or to a colored chalk, more particularly erasable, sintered colored chalk, having a sintered lead or chalk base body which is formed from a lead or chalk base material containing at least one binder with a proportion of from 1 to 25% by weight and at least one filler with a proportion of from 25 to 99% by weight. The sintered lead or chalk base body is impregnated with at least one colorant and at least one lubricant.

A marking device that is supported by a personal mobility vehicle, such as a scooter, is movable from a first position, in which the marking device does not contact the riding surface, and a second position, in which the marking device contacts the riding surface. The marking device includes an attachment portion and a marking portion that creates markings on the riding surface as a result of frictional contact with the riding surface. The marking device can also include an actuation portion which is accessible to the user and allows the user to move the marking device to the second position. In one arrangement, the marking device includes an elastic marking member which is configured to bend in order to maintain contact with the riding surface.

A wax-based coloring crayon for a porous surface and for a non-porous surface includes at least one wax; an ethoxylated fatty alcohol, stearin, a filler, at least one pigment, and optionally an additive.

An art medium applicator includes a rotating shaft and an art medium coupled thereto for causing the medium to travel through an application path for transfer to a substrate. The applicator includes a coupling assembly, and may include an applicator tip including a cavity into which the art medium is inserted and supported. An art medium modifier includes a rotating shaft and an art medium modifier coupled thereto for causing the modifier to travel through an application path for modification of an art medium previously applied to a substrate.