Abstract: The magnetic tape includes a non-magnetic support; and a magnetic layer, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference L99.9?L0.1 between a value L99.9 of a cumulative distribution function of 99.9% and a value L0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an absolute value ?N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 or more and 0.40 or less.

Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder, in which the ferromagnetic powder is an ?-iron oxide powder having an average particle size of 5.0 nm to 16.0 nm, a coercivity Hc in a vertical direction is 1,884 Oe to 3,141 Oe, a ten-point average roughness Rz of a surface of the magnetic layer is 35.0 nm to 45.0 nm, and a ratio Rp/Rz of a maximum peak height Rp of the surface of the magnetic layer to the Rz is 0.25 to 1.00.

Abstract: Aspects of the present disclosure relate to a security device, in particular, a multilayered security device. The multilayered security device includes a substrate layer having a first substrate. The substrate layer attaches to the product. The multilayered security device also includes a graphene layer. The graphene layer has a first continuous graphene sheet that is made of a monolayer of covalently-bonded carbon atoms. The graphene layer also forms, in response to exposure to a verification stimulus, a contrasting pattern with respect to an exposed substrate area from the substrate layer.

Abstract: An aspect of the present invention relates to a method of manufacturing a vinyl polymer, which comprises: mixing a first liquid and a second liquid to conduct an addition reaction, wherein the first liquid has been obtained by reacting a sulfonic acid group-containing compound selected from the group consisting of taurine, N-methyl taurine, and meta-aminobenzenesulfonic acid with an alkali metal hydroxide in methanol, the second liquid comprises a vinyl polymer having an intramolecular epoxy group in a ketone solvent, and the addition reaction incorporates a sulfonic acid alkali metal salt group onto a side chain of the vinyl polymer.

Abstract: An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support, wherein the magnetic layer comprises a compound denoted by general formula (1): wherein, in general formula (1), X denotes a divalent linking group, each of R1 and R2 independently denotes an alkyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an alkoxyalkyl group having 2 to 20 carbon atoms, or an aryloxyalkyl group having 7 to 20 carbon atoms, and M denotes a hydrogen atom or a cation.

Abstract: An organic-pigment aqueous dispersion, containing a pigment at a concentration of 6 to 30 mass %, and having a haze of 0.3 to 10%, as determined by enclosing the dispersion in a transparent glass cell of optical distance 0.2 mm and analyzing with integrating-sphere photoelectric photometry; and a colored coating composition using the same.

Abstract: A magnetic recording medium is provided that includes a support and at least one magnetic layer provided on or above the support, the magnetic layer including a ferromagnetic powder dispersed in a binder and at least one type of compound selected from Formulae (I) to (III) below; (in Formulae (I) to (III), each R independently denotes an alkyl group having 1 to 20 carbons).

Abstract: The magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support. The magnetic layer has an average surface roughness Ra, measured by an atomic force microscope, ranging from 2.0 to 3.5 nm and an indentation hardness ranging from 0.49 GPa to 0.78 GPa, as well as further comprises a carbonic ester having a molecular weight of 360 to 460 that is denoted by general formula (1). In general formula (1), R1 denotes a saturated hydrocarbon group having a branched structure, and R2 denotes a saturated hydrocarbon group having a linear structure with 14 to 20 carbon atoms.

Abstract: The invention is directed to a magnetic thick film composition comprising particles of permanent magnetic materials dispersed in organic medium wherein the medium comprises a polymer selected from polyurethane, phenoxy and mixtures thereof, and organic solvent.

Abstract: The magnetic recording medium provided is produced by forming a substrate having a nanoparticle layer comprising an array of nanoparticles, and an organic compound between said array of nanoparticles; irradiating the nanoparticle layer with an infrared beam to magnetize the nanoparticles; applying a magnetic field to the nanoparticle layer to orient easy axis of magnetization of the magnetic nanoparticles in a substantially uniform direction; and irradiating the nanoparticle layer with an ultraviolet beam to bind said organic compound to thereby produce a magnetic recording medium wherein easy axis of magnetization of the nanoparticles has been oriented in a direction substantially parallel to a direction at a particular angle with the substrate. The resulting magnetic recording medium experiences no deterioration of the underlying layer or the soft magnetic layer, and exhibits good magnetic properties.

Abstract: A lagging material for application to the surface of a pulley, said material being integrally formed in elongate strip form and having an upper surface including a plurality of discrete nodules extending therefrom and arranged regularly or randomly according to a predetermined pattern and including a plurality of longitudinally spaced apart elongate and transversely extending cutting sipes laterally defined by the nodules so as to form a partial or complete boundary wall of each sipe; wherein said nodules are arranged over the upper surface of said material so as to allow cutting of a predetermined size of lagging from a larger sheet or strip of said lagging by effecting cuts along or across said cutting sipes and between said nodules.