The present disclosure provides an ink composition and a method for preparing an ink composition. The ink composition includes following compositions in parts by weight salt solution in an amount ranging from 500-1000 parts; iron filings in an amount ranging from 20-30 parts; hydrogen chloride in an amount ranging from 2-5 parts; deionized water in an amount ranging from 40-50 parts; monoglyceride stearate in an amount ranging from 1-2 parts; monolauryl phosphate and polydimethylsiloxane in an amount ranging from 5-10 parts; methacrylate in an amount ranging from 5-10 parts; thermoplastic acrylic resin in an amount ranging from 5-10 parts; sodium dioctyl succinate sulfonate in an amount ranging from 2-5 parts; sodium dodecyl benzene sulfonate in an amount ranging from 2-5 parts; polyoxyethylene octyl phenol ether in an amount ranging from 3-8 parts; and isobutyl p-hydroxybenzoate in an amount ranging from 0.5-1 parts.

A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.

A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.

An alcohol-based dry-erasable ink for a writing instrument including, as separation agent, a mixture of glycerol, glycol and pentaerythritol ester.

There is a non-aqueous gel writing ink having an organic solvent, a coloring agent and a gelling agent, and the gelling agent is non-oxidized cellulose nanofibers. There also is a use of non-oxidized cellulose nanofibers as a gelling agent in a non-aqueous gel writing ink. There is finally a writing instrument having the ink according to the present disclosure.

A product of additive manufacturing with a silicone-based ink includes a plurality of continuous filaments comprised of a siloxane matrix, wherein the continuous filaments are arranged in a geometric pattern, a plurality of inter-filament pores defined by the geometric pattern of the continuous filaments, and a plurality of intra-filament pores having an average diameter in a range of greater than 1 micron to less than 50 microns.

A product of additive manufacturing with a silicone-based ink includes a plurality of continuous filaments comprised of a siloxane matrix, wherein the continuous filaments are arranged in a geometric pattern, a plurality of inter-filament pores defined by the geometric pattern of the continuous filaments, and a plurality of intra-filament pores having an average diameter in a range of greater than 1 micron to less than 50 microns.

To provide a writing instrument capable of further improving durability of a writing nib without impairing writing performance even when writing is performed with a heavy writing load. A writing instrument A having a writing part formed of at least a writing nib 30 made of a porous body and a retainer 40 made of a hard material, in which the protrusion amount of the distal end of the writing nib 30 from the retainer 40 is 0.65 mm or more and 1.05 mm or less and/or 40% or more and 65% or less of the thickness of the writing nib 30.

The present disclosure provides, among other things, component parts that form curable compositions that are useful when forming dry-erase surface coatings and clear dry-erase surface coatings. In some embodiments, when a composition is extended on a substrate and cured, a surface coating or clear surface coating forms that demonstrates at least one dry-erase characteristic. The present disclosure also provides methods of forming and using such compositions.

The present disclosure provides, among other things, component parts that form curable compositions that are useful when forming dry-erase surface coatings and clear dry-erase surface coatings. In some embodiments, when a composition is extended on a substrate and cured, a surface coating or clear surface coating forms that demonstrates at least one dry-erase characteristic. The present disclosure also provides methods of forming and using such compositions.