Ricoh Company, Ltd.

Kento Sugita

Satoshi Takahashi

Koichiro Oyama

Mizuki Kuroha

Akihiko Matsuyama

Takashi Watanabe

Kazuhiko Umemura

Shun Saito

Yuuki Yokohama

Amika Sagara

Azumi Miyaake

Masaki Kudo

Mayumi Yoshihara

A liquid composition contains a macrocyclic compound enclosing a metal ion, water, and an organic solvent, wherein a recording medium where the liquid composition has been applied has at least one of an antibacterial activity or an antiviral activity.

Liquid composition, method of applying liquid, device for applying liquid, pre-processing fluid, and set of pre-processing fluid and ink

An ink including a pigment, water, and a resin is provided. An image formed with the ink on a print medium has a tack force of 6 gf or greater but 13 gf or less when measured at a probe temperature of 100 degrees C., where the image is a solid image formed at a resolution of 1,200 dpi, subsequently irradiated with light of 395 nm for 0.6 seconds, and left to stand at normal temperatures and normal humidities for 30 seconds.

Ink, image forming apparatus, and image forming method

An ink includes at least one polyether-modified siloxane compound, and at least one aliphatic alcohol alkylene oxide compound. The mass ratio of the polyether-modified siloxane compound to the aliphatic alcohol alkylene oxide compound in the ink is from 95/5 to 50/50.

Ink, ink set, ink container, image forming method, image forming apparatus and recorded matter

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Tokyo, Japan

Kento Sugita