According to one embodiment, a silicone-based ink for additive manufacturing includes a vinyl-terminated diphenyl siloxane macromer, a treated silica hydrophobic reinforcing filler, a rheology modifying additive, and a plurality of porogen particles. According to another embodiment, a product of additive manufacturing with a silicone-based ink includes a plurality of continuous filaments comprised of a siloxane matrix, where 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.

According to one embodiment, a silicone-based ink for additive manufacturing includes a vinyl-terminated diphenyl siloxane macromer, a treated silica hydrophobic reinforcing filler, a rheology modifying additive, and a plurality of porogen particles. According to another embodiment, a product of additive manufacturing with a silicone-based ink includes a plurality of continuous filaments comprised of a siloxane matrix, where 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.

An aqueous writing, marking and/or drawing liquid is configured for capillary systems, more particularly for applicator implements having a capillary system. The liquid has a viscosity of less than 50 mPas, more particularly less than 20 mPas (Brookfield, 20° C., cone-plate CPE-40). The liquid contains a wetting agent, graphite having a carbon content of between 95 and 99.9 wt %, an ash content of between 0.1 and 5 wt %, and a particle size ≤20 μm at D90, and at least one release agent, more particularly in a concentration of 2 to 15 wt %. The release agent contains barium sulfate and/or an aqueous, highly mobile, nonsedimenting colloidal dispersion of nanoparticulate silicon dioxide particles.

The present invention provides: a highly practical and safe oil-based ink composition for a writing board, said composition being capable of imparting high mark-erasability and having excellent resistance to drying up; and a marking pen incorporating the same. Specifically, the present invention provides: an oil-based ink composition for a writing board, said composition containing a pigment, an organic solvent, a resin, and at least one compound selected from compounds represented by general formula (1) or (2); and a marking pen obtained by incorporating the oil-based ink composition for a writing board. (In the formulae, R.sup.1-R.sup.4 each represent a C6-18 alkyl group or a C2-18 and O2-10 alkoxypolyglycol group.)

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The present invention provides: a highly practical and safe oil-based ink composition for a writing board, said composition being capable of imparting high mark-erasability and having excellent resistance to drying up; and a marking pen incorporating the same. Specifically, the present invention provides: an oil-based ink composition for a writing board, said composition containing a pigment, an organic solvent, a resin, and at least one compound selected from compounds represented by general formula (1) or (2); and a marking pen obtained by incorporating the oil-based ink composition for a writing board. (In the formulae, R.sup.1-R.sup.4 each represent a C6-18 alkyl group or a C2-18 and O2-10 alkoxypolyglycol group.)

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To provide a marking ink composition for a writing board having excellent erasability of drawn lines, the marking ink composition essentially containing a pigment, a pigment dispersant resin, a masking agent, and a modified polyvinylalcohol or a polyvinylalcohol having a degree of saponification from 40 to 84% by molar ratio.

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.

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.

This oil-based ink composition for writing implements contains a colorant, a resin, an organic solvent, and fluorine-based resin particles, the average particle size of the fluorine-based resin particles being at least 0.1 μm and less than 1.0 μm when measured by a dynamic light scattering method.

The present disclosure concerns non-aqueous gel writing ink including a solvent, a coloring agent and a gelling agent, in which the gelling agent is a mixture of silica particles and of a fatty acid amide wax. It also concerns the process of preparation of the non-aqueous gel writing ink and the use of a mixture of silica particles and of a fatty acid amide wax, as a gelling agent in a non-aqueous gel writing ink. It finally concerns a writing instrument containing the ink according to the present disclosure.