Disclosed herein are stretchable conductive ink compositions comprising a polymer, conductive flake, an additive, and optionally conductive beads, wherein the initial resistivity is measured before elongation, and wherein the resistivity at 50% elongation is about 10 times or less of the initial resistivity.

Disclosed herein are stretchable conductive ink compositions comprising a polymer, conductive flake, an additive, and optionally conductive beads, wherein the initial resistivity is measured before elongation, and wherein the resistivity at 50% elongation is about 10 times or less of the initial resistivity.

Methods for reducing moisture content of alkaline earth metal carbonate may include introducing alkaline earth metal carbonate having a moisture content ranging from about 0.1% by mass to about 10% by mass into a primary crusher and operating the primary crusher to obtain alkaline earth metal carbonate particles having a top cut particle size d.sub.90 of 90 microns or less. The method may also include introducing the particles into a primary grinder and operating the primary grinder to obtain reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 60 microns or less. The method may further include introducing the reduced-size particles into a classifier mill and operating the classifier mill to obtain further-reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 12 microns or less, and a moisture content of about 0.15% by mass or less.

Methods for reducing moisture content of alkaline earth metal carbonate may include introducing alkaline earth metal carbonate having a moisture content ranging from about 0.1% by mass to about 10% by mass into a primary crusher and operating the primary crusher to obtain alkaline earth metal carbonate particles having a top cut particle size d.sub.90 of 90 microns or less. The method may also include introducing the particles into a primary grinder and operating the primary grinder to obtain reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 60 microns or less. The method may further include introducing the reduced-size particles into a classifier mill and operating the classifier mill to obtain further-reduced-size alkaline earth metal carbonate particles having a median particle size d.sub.50 of about 12 microns or less, and a moisture content of about 0.15% by mass or less.

Composite particles contained in an ink are particles of a composite of a polyester resin including a sulfonic acid group and a basic dye. The polyester resin has a glass transition point of 40° C. to 70° C. The polyester resin includes a first repeating unit derived from a polyvalent carboxylic acid having the sulfonic acid group, a second repeating unit derived from a polyvalent carboxylic acid having no sulfonic acid group, and a third repeating unit derived from a polyhydric alcohol. The content ratio of the first repeating unit relative to the total amount of the first repeating unit and the second repeating unit is at least 1.5 mol % and no greater than 20.0 mol %. The mass ratio of the polyester resin to the basic dye is at least 1.0 and no greater than 10.0.

Composite particles contained in an ink are particles of a composite of a polyester resin including a sulfonic acid group and a basic dye. The polyester resin has a glass transition point of 40° C. to 70° C. The polyester resin includes a first repeating unit derived from a polyvalent carboxylic acid having the sulfonic acid group, a second repeating unit derived from a polyvalent carboxylic acid having no sulfonic acid group, and a third repeating unit derived from a polyhydric alcohol. The content ratio of the first repeating unit relative to the total amount of the first repeating unit and the second repeating unit is at least 1.5 mol % and no greater than 20.0 mol %. The mass ratio of the polyester resin to the basic dye is at least 1.0 and no greater than 10.0.

The purpose of the present invention is to provide a pigment composition having outstanding dispersion characteristics, weather resistance, and heat resistance, has favorable storage stability, minimizes fading over time in a basic atmosphere, and contains isoindoline compounds.

The pigment composition contains the isoindoline compound represented by formula (1) below and the isoindoline compound represented by formula (2) below.

##STR00001## [in the formula, R.sub.1 to R.sub.4 represent hydrogen atoms, R.sub.5 and R.sub.6 each independently represent alkyl groups, and A and A′ represent a group represented by formula (3) below, formula (4) below, or formula (5) below,

##STR00002## In the formula, X represents —O— or —NH—, R.sub.7 represents an alkyl group or an aryl group, and R.sub.8 to R.sub.14 each independently represent hydrogen atoms, halogen atoms, alkyl groups, alkoxy groups, aryl groups, aryloxy groups, thioalkyl groups, or thioaryl groups.]

The purpose of the present invention is to provide a pigment composition having outstanding dispersion characteristics, weather resistance, and heat resistance, has favorable storage stability, minimizes fading over time in a basic atmosphere, and contains isoindoline compounds.

The pigment composition contains the isoindoline compound represented by formula (1) below and the isoindoline compound represented by formula (2) below.

##STR00001## [in the formula, R.sub.1 to R.sub.4 represent hydrogen atoms, R.sub.5 and R.sub.6 each independently represent alkyl groups, and A and A′ represent a group represented by formula (3) below, formula (4) below, or formula (5) below,

##STR00002## In the formula, X represents —O— or —NH—, R.sub.7 represents an alkyl group or an aryl group, and R.sub.8 to R.sub.14 each independently represent hydrogen atoms, halogen atoms, alkyl groups, alkoxy groups, aryl groups, aryloxy groups, thioalkyl groups, or thioaryl groups.]

An ink set includes an inkjet ink and a pretreatment liquid. The inkjet ink contains pigment particles, an anionic dispersant, and binder resin particles. The pigment particles have a major axis of at least 50 nm and no greater than 200 nm. The pigment particles have an aspect ratio of at least 2.0 and no greater than 3.0. The binder resin particles contain a specific binder resin. The specific binder resin has a glass transition point of at least 0° C. and no higher than 45° C. The pretreatment liquid contains water and a cationic material.

An ink set includes an inkjet ink and a pretreatment liquid. The inkjet ink contains pigment particles, an anionic dispersant, and binder resin particles. The pigment particles have a major axis of at least 50 nm and no greater than 200 nm. The pigment particles have an aspect ratio of at least 2.0 and no greater than 3.0. The binder resin particles contain a specific binder resin. The specific binder resin has a glass transition point of at least 0° C. and no higher than 45° C. The pretreatment liquid contains water and a cationic material.