A moldable eraser kit includes a first silicone polymer, a second silicone polymer, an abrasive agent, a catalyst configured to catalyze a reaction between the first silicone polymer and the second silicone polymer at room temperature, and at least two containers such that the first silicone polymer, the second silicone polymer, and the catalyst are not all present in the same container. Also disclosed herein is a method of making an eraser including the steps of mixing a first silicone polymer, a second silicone polymer, a catalyst, an abrasive agent, and optionally one or more additives to form a mixture, the mixture being free of polyvinyl chloride. The method also includes molding the mixture to form a shape and curing the mixture in the shape at room temperature to form a molded eraser.

A composition comprising; a) at least one homopolymer or copolymer of vinyl acetate; and b) at least one softener.

Holder (2) for utilities (10, 11) for a metal whiteboard (9), characterised in that the holder (2) comprises a cover plate (3), which on a side hidden when in use, is provided with one or more supports (4, 5), at least one of the free ends of which is provided with a magnet (7, 8) to be able to place the holder (2) in a desired position on the whiteboard (9) and whereby the cover plate (3) on the same side hidden when in use, is provided with a brush (12) with bristles made of an elastic polymer, said bristles (13) being oriented with the bristle tops diagonally or perpendicularly to the surface of the whiteboard (9).

Provided is a retractable writing instrument including a pen point, a barrel, and a clip. The pen point is configured to be in a state of projecting from the barrel or a state of being retracted into the barrel by sliding the clip in a longitudinal direction of the barrel. The clip includes a clip body extending in the longitudinal direction of the barrel, a ball portion provided on a front side of the clip body and projecting in a direction of a surface of the barrel, and a clip base provided on a rear side of the clip body and is configured to produce a biasing force in a direction of a surface of the barrel. The surface of the barrel includes a guide groove extending in the longitudinal direction of the barrel and provided with a pair of side surfaces to restrict lateral movement of the ball portion, and the guide groove has a through groove capable of causing the ball portion to be in a noncontact state in a direction of the biasing force at least when the pen point is in the retracted state.

An eraser assembly is provided that includes a housing, a tray, and a coupler disposed between a surface of the tray and a surface of the housing. The housing has a concave shape including an interior portion. The tray has a retaining portion disposed in the interior portion and a mounting portion disposed opposite of the retaining portion. The coupler is configured to releasably hold the tray to the housing. An eraser insert configured to be disposed in the interior portion of the housing and to be enclosed by the tray.

A thermochromic ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with thermochromic ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the thermochromic ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position.

An erasable ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with erasable ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the erasable ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position. The erasable ink is a peelable ink and the eraser is a friction body.

To provide a pen tip that can enhance its color brilliance and color distinctiveness as well as providing a writing tool having the pen tip. A pen tip A of the present invention is a pen tip equipped with a pen core 20 containing a concealing material, and is characterized in that the pen core has the lightness (L* value) of 80 or higher in the L*a*b* (CIELAB) color system. The writing tool, for example, includes a retention body 10 having a visible part allowing visual recognition of the writing direction and the pen tip A having the above configuration and attached with the retention body 10.

A mechanism of a daily commodity ejecting and retracting device includes an operating portion provided to rotate around a center line vertical to an axis line of a shaft tube in relation to the shaft tube between a first rotation position and a second rotation position. A rod portion is coupled within the shaft tube to rotate around a first axis line and is coupled to the daily commodity to rotate around a second axis line which is parallel to the first axis line. An eccentric position of the first axis line is set so that the daily commodity is immersed into the shaft tube via the rod portion when the operating portion is rotated to the first rotation position, and the daily commodity protrudes out of a leading end port of the shaft tube via the rod portion when the operating portion is rotated to the second rotation position.

A writing board holder adapted for use with various writing boards and writing implements, incorporating a design attractive to children for interactive play. The writing board holder comprises at least one support post with an attached writing board, and appendages which can be used with writing and erasing implements to draw on the board and clean the board.