Abstract: An image formation apparatus according to an embodiment may include: a non-lustrous image formation unit; a lustrous image formation unit; and a controller configured to control the non-lustrous image formation unit to form a non-lustrous image of a non-lustrous developer on a first surface of a medium, and the lustrous image formation unit to form a lustrous image of a lustrous developer including a first region and a second region on a second surface opposite to the first surface, such that a difference between a first adhesion ratio and a second adhesion ratio is 18.75% or more and 37.50% or less, where the first adhesion ratio is an amount of the lustrous developer adhered to the medium per unit area in the first region, and the second adhesion ratio is an amount of the lustrous developer adhered to the medium per unit area in the second region.

Abstract: Provided is a fixing device including an annular belt; a heating member provided on an inner peripheral surface's side of the annular belt; a facing member provided on a facing surface of the heating member facing the inner peripheral surface; and a pressing member that is provided on an outer peripheral surface's side of the annular belt and forms a nip region between the pressing member and the facing member via the annular belt, wherein the facing member includes resin and carbon.

Abstract: Provided is a fixing device including an annular belt; a heating member provided on an inner peripheral surface's side of the annular belt; a facing member provided on a facing surface of the heating member facing the inner peripheral surface; and a pressing member that is provided on an outer peripheral surface's side of the annular belt and forms a nip region between the pressing member and the facing member via the annular belt, wherein the facing member includes resin and carbon.

Abstract: A fixing device includes a belt member, a heater, a base layer, and an opposed layer. The heater is provided on an inner circumferential surface of the belt member. The base layer includes a first surface on a heater side and a second surface on an opposite side to the first surface. The opposed layer covers the second surface and is opposed to the inner circumferential surface of the belt member. The base layer and the opposed layer satisfy the following conditional expression (1), 0<(Tb×Da)/(Ta×Db)?1.17??(1) where Ta is a thickness of the base layer in millimeters, Tb is a thickness of the opposed layer in millimeters, Da is a thermal diffusivity of the base layer in square millimeters per second, and Db is a thermal diffusivity of the opposed layer in square millimeters per second.

Abstract: A fixing device includes a belt member, a heater, a base layer, and an opposed layer. The heater is provided on an inner circumferential surface of the belt member. The base layer includes a first surface on a heater side and a second surface on an opposite side to the first surface. The opposed layer covers the second surface and is opposed to the inner circumferential surface of the belt member. The base layer and the opposed layer satisfy the following conditional expression (1), 0<(Tb×Da)/(Ta×Db)?1.17??(1) where Ta is a thickness of the base layer in millimeters, Tb is a thickness of the opposed layer in millimeters, Da is a thermal diffusivity of the base layer in square millimeters per second, and Db is a thermal diffusivity of the opposed layer in square millimeters per second.