34results about How to "Improve erasability" patented technology

A water base erasable ink composition for use in marking pens which comprises 0.05-20% by weight of a colorant and 1-20% by weight of an oily material which is nonvolatile at normal temperatures (25° C.) and is dispersed in water, wherein the oily material has a viscosity of 5-40 mPa·s at 20° C. and is dispersed in water in the form of emulsion, and wherein the colorant is dispersed in the water with the aid of a polyvinyl alcohol resin as a dispersing agent which has a saponification degree of 70-85 mol % and of which aqueous solution of 4% concentration has a viscosity of 2-30 mPa·s at 20° C. in a weight ratio of the resin to the colorant of 0.5 to 5 and in an amount of 1 to 10% by weight based on the ink composition.

To provide an image processing method including at least one of an image recording step and an image erasing step, wherein (1) laser beams are swept in the same direction and laser scanning involves a period where laser application is discontinued, (2) laser beams are swept in alternating directions and the laser scanning involves a period where laser application is discontinued, (3) laser beams are swept in alternating directions and laser scanning involves a period where laser application is discontinued, wherein the period involves no laser beam application from first laser scanning end point to second laser scanning point, or (4) laser beams are applied in alternating directions while avoiding continuous laser irradiation of nearby portions between adjacent laser beam lines, and laser scanning involves a period where laser application is discontinued.

A phase-change optical recording medium which attains a high erasability in overwriting at a high linear velocity and has high recording sensitivity, excellent OW cycling characteristics, and excellent weatherability. The phase-change optical recording medium comprises a substrate and formed thereon a multilayered film comprising a protective layer and a recording layer and is that information is recorded / erased based on reversible phase changes in the recording layer between a crystalline phase and an amorphous phase, wherein the protective layer is a film made of an oxide of tantalum or aluminum and at least one carbide, and the content of the carbide is from 1 to 40 mol %.

The invention relates to a high-gloss, high-hardness, easily-scrubbed and scrubbing-resistant metal material. The metal material comprises a base plate and a protective coating formed on the base plate, wherein ultraviolet (UV) curing paint is used by the protective coating; the raw material formulation of the UV curing paint comprises the following components by weight percent: 15-25% of epoxy resin, 35-45% of a UV monomer, 30-40% of yellowing-resistant resin, 1-5% of a photoinitiator, 0.1-1.5% of a flatting agent, 0.1-1.5% of a defoaming agent and 0.5-3% of anti-fouling material. The protective coating of the metal material has smooth hand feel, and is high in hardness and scratch-resistant. When a metal material is used for a writing board, the writing board has bright and full surface and is excellent in erasable property; the anti-fouling material is added into the formulation of the patient, so that whiteness residue and coloring are not easily caused by watermarks during writing, and the writing board has better writing performance and better sustainable wiping property.