A pretreatment solution which is used together with an aqueous inkjet ink that contains at least a pigment, wherein the pretreatment solution contains an inorganic metal salt and/or an organic metal salt that exists in a dissolved state, and an organic solvent, the organic solvent contains a compound having one or more hydroxyl groups in each molecule, and the amount of the organic solvent is from 0.1 to 50% by weight based on the total weight of the pretreatment solution.

An imprint apparatus, comprises: a discharge unit that discharges a liquid onto a substrate; a storage unit that stores a plurality of discharge conditions for the discharge unit; and a control unit that controls the discharge unit based on a discharge condition that is stored in the storage unit, wherein the control unit selects the discharge condition from the plurality of discharge conditions in accordance with a discharge spacing for discharging the liquid.

An imprint apparatus, comprises: a discharge unit that discharges a liquid onto a substrate; a storage unit that stores a plurality of discharge conditions for the discharge unit; and a control unit that controls the discharge unit based on a discharge condition that is stored in the storage unit, wherein the control unit selects the discharge condition from the plurality of discharge conditions in accordance with a discharge spacing for discharging the liquid.

In an example, a printing device can include a pivot point, a bias arm formed of a rigid member to rotate about the pivot point, the bias arm comprising a first end to extend into a print zone and a second end opposite the first end, and a spring in communication with the second end of the bias arm to bias the first end to contact the platen.

A printing apparatus includes a printing section, an imaging section, a color measurement section, and a discharge amount upper limit determining section. The imaging section is configured to capture an image of a test medium on which a test pattern has been printed. The color measurement section is configured to execute color measurement on the test medium. The discharge amount upper limit determining section is configured to determine an upper limit of an amount of ink to be discharged based on at least one of a color saturation suppression upper limit calculated based on color measurement information of the test medium obtained by the color measurement section and at least one of an overflowing suppression upper limit, a bleeding suppression upper limit, and an aggregation suppression upper limit calculated based on imaging information of the test medium obtained by the imaging section.

A printing apparatus includes a printing section, an imaging section, a color measurement section, and a discharge amount upper limit determining section. The imaging section is configured to capture an image of a test medium on which a test pattern has been printed. The color measurement section is configured to execute color measurement on the test medium. The discharge amount upper limit determining section is configured to determine an upper limit of an amount of ink to be discharged based on at least one of a color saturation suppression upper limit calculated based on color measurement information of the test medium obtained by the color measurement section and at least one of an overflowing suppression upper limit, a bleeding suppression upper limit, and an aggregation suppression upper limit calculated based on imaging information of the test medium obtained by the imaging section.

Provided is a liquid droplet generation method capable of generating liquid droplets having a diameter of 100 ?m or more. The liquid droplet generation method for generating liquid droplets from a liquid layer 20 by using a plurality of transducers 18, the method including irradiating the liquid layer 20 with a plurality of ultrasonic waves from the plurality of transducers 18 to scatter primary liquid droplets 21A and 21B from the liquid layer 20, and causing the primary liquid droplets 21A and 21B being scattered to aggregate and grow into a secondary liquid droplet 22A.

Provided is a liquid droplet generation method capable of generating liquid droplets having a diameter of 100 ?m or more. The liquid droplet generation method for generating liquid droplets from a liquid layer 20 by using a plurality of transducers 18, the method including irradiating the liquid layer 20 with a plurality of ultrasonic waves from the plurality of transducers 18 to scatter primary liquid droplets 21A and 21B from the liquid layer 20, and causing the primary liquid droplets 21A and 21B being scattered to aggregate and grow into a secondary liquid droplet 22A.

A pretreatment liquid for an impermeable medium is a pretreatment liquid including water, a resin, and an organic acid, in which a ratio of a content of the resin to a content of the organic acid is greater than 0 and less than 4 on a mass basis, and the organic acid is a compound represented by Formula 1. In Formula 1, l represents 1 or greater, m represents 0 or 1, n represents 1 or greater, and l+m+n is 2 or greater. R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently represent a hydrogen atom, a hydroxyl group, a carboxy group, an amino group, or an alkyl group having 1 to 4 carbon atoms. ##STR00001##

A pretreatment liquid for an impermeable medium is a pretreatment liquid including water, a resin, and an organic acid, in which a ratio of a content of the resin to a content of the organic acid is greater than 0 and less than 4 on a mass basis, and the organic acid is a compound represented by Formula 1. In Formula 1, l represents 1 or greater, m represents 0 or 1, n represents 1 or greater, and l+m+n is 2 or greater. R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each independently represent a hydrogen atom, a hydroxyl group, a carboxy group, an amino group, or an alkyl group having 1 to 4 carbon atoms. ##STR00001##