A method, apparatus for making, and a retroreflective traffic sign consists of a polymeric film having a front face and a rear face, wherein the rear face has a pattern of microprismatic retroreflective elements integrally formed as part of said film; a pattern of cell walls formed of an adhesive-containing polymer defining cells in which the microprismatic retroreflective elements are in the cells; and a substrate is adhered directly to the cell walls formed of the adhesive-containing polymer while leaving an air gap between the microprismatic retroreflective elements and the substrate in the cells.

A continuous polymer sheet casting apparatus includes first and second endless belts positioned in face to face relationship to each other for a portion of their lengths to form between their inside surfaces a mold cavity for molding a polymeric sheet therebetween, and a container in fluid communication with the mold cavity, the container configured to introduce a liquid monomer or liquid polymer and curing agent and/or initiator to the cavity for polymerization therein; a controlled cooling apparatus in thermal communication with the mold cavity, configured to cool and solidify the polymeric sheet as it moves through the mold cavity, wherein either the first, the second, or the first and second endless belts include a microstructured optical quality tool area on at least a portion of said belt or belts. A mold and process for molding is also disclosed.

Provided are a reflective sheet having selective reflection in a wide wavelength range and a small change in tint depending on angles at which light is visually recognized, a decorative sheet, and a method of manufacturing a reflective sheet, the reflective sheet including a pitch gradient layer in which a helical pitch changes in a thickness direction of the layer. The reflective sheet includes at least one cholesteric liquid crystal layer having wavelength selective reflection properties, in which at least one of the cholesteric liquid crystal layers is a pitch gradient layer in which a helical pitch changes in a thickness direction, a half-width of an integral reflection spectrum of the reflective sheet is 100 nm or longer, and in a case where a wavelength on a short wavelength side that defines the half-width is represented by , a wavelength on a long wavelength side that defines the half-width is represented by , a center wavelength that defines the half-width is represented by .sub.C, .sub.1=(+.sub.C/2, and .sub.2=(.sub.C+)/2, the following Expressions (1) and (2) are satisfied.

IR(.sub.1)>IR(.sub.2) Expression (1)

SCE(.sub.1)/IR(.sub.1)>SCE(.sub.2)/IR(.sub.2) Expression (2)

Retroreflective sheeting having a structured layer of cube corner elements and an at least one optically variable mark therein, and methods of making same.

The present application relates generally to retroreflective sheeting and the tools and methods used to make retroreflective sheeting. Microreplication tools and sheeting include controlled surface structure or haze. The surface structure or haze can be introduced, for example, by chemical etching of the tool surface and/or electroplating.

Retroreflective sheeting comprising cube corner microstructure and having channels substantially parallel to a longitudinal, peripheral edge of the sheeting.

Retroreflective sheeting having a structured layer of cube corner elements and an at least one optically variable mark therein, and methods of making same.

The present disclosure is directed to lamina(e) comprising cube corner elements, a tool comprising an assembly of laminae and replicas thereof. The disclosure further relates to retroreflective sheeting.

A multi-part medical marker (1) comprising a marker core consisting of at least two corresponding parts (2a, 2b) and comprising a detectable surface, wherein the surface is substantially formed from a detectable coating (4) which is applied to the surface (3) of the parts (2a, 2b) of the marker core (2). An apparatus for producing a medical marker comprising a marker core (2) and a detectable surface, comprises: a first feeding device (16) for providing the marker core (2); an application device (17) for applying a detectable layer to the surface (3) of the marker core (2); anda transport device (18) for transporting the marker core (2) within the apparatus.

This disclosure provides a method for manufacturing a silver-plated reflecting film. The method includes following steps: (1) manufacturing a reflecting polyester film layer; (2) coating a silver-plated layer on one surface of the reflecting polyester film layer by a vacuum sliver plating method, wherein the vacuum sliver plating methods comprises a vacuum evaporation plating method or a vacuum sputtering silver plating method; and (3) applying a protection layer film on the silver-plated layer and obtaining the silver-plated reflecting film.