In one embodiment, a reusable writing panel including a writing surface and attachment mechanisms is disclosed. The writing panel may include a stacked layer configuration, having a front or first layer defining a writing surface and a rear or second layer defining a connection surface, with an optional spacer layer positioned therebetween. The connection surface may include one or more attachable or securable elements, such as a first attraction element and a second attraction element, that may generate different types of attraction forces, e.g., magnetic and suction. This variation in connection types allows the panel to be securable to various types of objects or surfaces, e.g., magnetic and non-magnetic surfaces.

A liquid crystal writing device with enhanced line acuity includes the following features. Included is a front writing surface. A liquid crystal layer includes a dispersion of cholesteric liquid crystal and polymer, wherein a reflectance of the cholesteric liquid crystal changes in response to pressure applied to the front writing surface so as to form an image on the liquid crystal layer. The liquid crystal layer is disposed between electrically conductive layers. A second of the electrically conductive layers is more distal from the front writing surface than a first of the electrically conductive layers is from the front writing surface. A backing supports the pressure applied to the front writing surface. An adhesive layer is disposed between the second of the electrically conductive layers and the backing. A line acuity of the image has a value of not more than 3.0 determined according to the Line Acuity Measurement Method of this disclosure.

A liquid crystal writing device with enhanced line acuity includes the following features. Included is a front writing surface. A liquid crystal layer includes a dispersion of cholesteric liquid crystal and polymer, wherein a reflectance of the cholesteric liquid crystal changes in response to pressure applied to the front writing surface so as to form an image on the liquid crystal layer. The liquid crystal layer is disposed between electrically conductive layers. A second of the electrically conductive layers is more distal from the front writing surface than a first of the electrically conductive layers is from the front writing surface. A backing supports the pressure applied to the front writing surface. An adhesive layer is disposed between the second of the electrically conductive layers and the backing. A line acuity of the image has a value of not more than 3.0 determined according to the Line Acuity Measurement Method of this disclosure.

A wall anchors in the form of a base with one or more wall penetrating retainers having respective wall penetrating extents that are curved. The retainers and base are configured to enable manual insertion onto wall without the use of tools.

Dry erase articles are described comprising a writable surface layer comprising a cured hardcoat composition comprising the reaction product of certain low surface energy compound(s). In one embodiment, the compound(s) comprise a C18-C36 hydrocarbon group and an ethylenically unsaturated group. In another embodiment, a mixture of compounds is utilized, the mixture comprising first compounds comprising a C18-C36 hydrocarbon group and an ethylenically unsaturated group and second compounds comprising a C8-C17 hydrocarbon group and an ethylenically unsaturated group, wherein the first and second compound are present at a weight ratio of 3:2 to 4:1.

An electronic board includes: a sensor sheet including X parallel electrode wires and Y parallel electrode wires, and a chassis to which the sensor sheet is attached. A sensor substrate is connected to a lower end of the sensor sheet. A sensor substrate is connected to a right end of the sensor sheet. The sensor substrate is disposed on a back surface of the chassis with a portion close to the lower end of the sensor sheet being bent to cover a lower end of the chassis.

A method of reusing a notebook provides a notebook having a synthetic-paper page. The method also provides a thermochromic ink pen which, when used to write on the synthetic paper page, leaves thermochromic ink markings. The method further provides a moisture carrier configured to have a liquid diffused therein. The moisture carrier is configured to erase the thermochromic ink markings from the synthetic-paper page by contacting the thermochromic ink markings when the moisture carrier is moist. The method then writes with thermochromic ink on at least a portion of the synthetic-paper page. Liquid is diffused in the moisture carrier, and the portion of the synthetic-paper page having the thermochromic ink is wiped with the moist moisture carrier, such that the thermochromic ink is erased from the synthetic-paper page.

A method of reusing a notebook provides a notebook having a synthetic-paper page. The method also provides a thermochromic ink pen which, when used to write on the synthetic paper page, leaves thermochromic ink markings. The method further provides a moisture carrier configured to have a liquid diffused therein. The moisture carrier is configured to erase the thermochromic ink markings from the synthetic-paper page by contacting the thermochromic ink markings when the moisture carrier is moist. The method then writes with thermochromic ink on at least a portion of the synthetic-paper page. Liquid is diffused in the moisture carrier, and the portion of the synthetic-paper page having the thermochromic ink is wiped with the moist moisture carrier, such that the thermochromic ink is erased from the synthetic-paper page.

A musical instrument instruction system includes a re-writable board having a writable surface suitable for use with erasable ink, and a first non-erasable image of at least a portion of a violin family instrument. The first non-erasable image is disposed within the writable surface of the re-writable board to enable overlap of the first non-erasable image by erasable ink received on the writable surface.

A musical instrument instruction system includes a re-writable board having a writable surface suitable for use with erasable ink, and a first non-erasable image of at least a portion of a violin family instrument. The first non-erasable image is disposed within the writable surface of the re-writable board to enable overlap of the first non-erasable image by erasable ink received on the writable surface.