Planographic printing plate precursor, planographic printing plate precursor laminate, plate-making method for planographic printing plate, and planographic printing method

A plate-making method for a planographic printing plate, comprising:

• a step of image-exposing a planographic printing plate precursor;
• and
• a step of supplying at least any one of printing ink or dampening water to remove an unexposed portion of the image recording layer on a printing press so that a planographic printing plate is prepared;
• wherein the planographic printing plate precursor comprises in the following order, on an aluminum support:
• an image recording layer;
• and
• a protective layer,
• wherein a thickness of the protective layer is 0.2 μm or greater,
• in a case where a Bekk smoothness of a surface of an outermost layer on a side opposite to a side where the image recording layer is provided is denoted by b seconds, the following Expression (1) is satisfied:
• b≤1000 (1),
• an arithmetic average height Sa of a surface of an outermost layer on a side where the image recording layer is provided is in a range of 0.1 μm to 20 μm,
• the image recording layer contains a polymer compound having a particle shape, and
• the protective layer is a layer which is in direct contact with the image recording layer.