Pretreatment solution for inkjet recording, inkjet recording apparatus, and image forming method

A pretreatment solution for inkjet recording comprising a photoacid generator that generates sulfonic acid through light exposure,

• wherein the photoacid generator is a compound represented by general formula (I) or (II) shown below,
• where in general formulae (I) and (II),
• R1 represents an alkyl group optionally substituted with a first substituent, a cycloalkyl group optionally substituted with a second substituent, an aryl group optionally substituted with the second substituent, a heterocyclic group optionally substituted with the second substituent, a fluorine atom, a nitro group, or a cyano group,
• R2 represents a hydrogen atom, an alkyl group optionally substituted with the first substituent, an alkenyl group optionally substituted with the first substituent, an alkynyl group optionally substituted with the first substituent, a cycloalkyl group optionally substituted with the second substituent, a cycloalkenyl group optionally substituted with the second substituent, a cycloalkynyl group optionally substituted with the second substituent, an aryl group optionally substituted with the second substituent, a heterocyclic group optionally substituted with the second substituent, an acylamide group, a sulfonylamide group, or a halogen atom,
• the first substituent is a fluorine atom or an aryl group,
• the second substituent is a fluorine atom, an alkyl group, a fluoroalkyl group, an alkoxy group, a carboxy group, an alkylcarbonyl group, or an alkylamino group,
• X represents a hydrogen atom or a methyl group, a plurality of Xs being the same as or different from one another, and when there is X bonding to a carbon atom in γ-position of a carbonyl group, at least one X bonding to a carbon atom in γ-position being a hydrogen atom,
• Y represents a hydrogen atom or a methyl group,
• p represents an integer of at least 1 and no greater than 3,
• q represents an integer of at least 0 and no greater than 3, and
• r represents 1 or 2.