Thermosensitive recording layer forming liquid, thermosensitive recording medium and production method thereof, and image recording method

A thermosensitive recording medium, comprising:

• a support;
• and
• a thermosensitive recording layer disposed on the support, the thermosensitive recording layer including
• an electron-donating compound, and
• an electron-accepting compound, where a solubility of the electron-accepting compound to 100% ethanol at 20° C. is 5.0% by mass or less,
• wherein a variation in a thickness of the thermosensitive recording layer represented by a formula below is 50% or less, where the variation is a variation in a region of the thermosensitive recording layer excluding an edge of the thermosensitive recording layer, Variation in thickness of thermosensitive recording layer (%)=[(the maximum thickness of the thermosensitive recording layer or the minimum thickness of the thermosensitive recording layer−an average thickness of the thermosensitive recording layer)/the average thickness of the thermosensitive recording layer]×100
• where the maximum thickness of the thermosensitive recording layer is a maximum value of the thickness of the thermosensitive recording layer, and the minimum thickness of the thermosensitive recording layer is a minimum value of the thickness of the thermosensitive recording layer, when the thickness of the thermosensitive recording layer is measured at arbitrary 20 points on the thermosensitive recording medium, and the average thickness of the thermosensitive recording layer is an average value of values measured at 18 points excluding the maximum thickness of the thermosensitive recording layer and the minimum thickness of the thermosensitive recording layer among the 20 points, the larger value between an absolute value of (the maximum thickness of the thermosensitive recording layer—the average thickness of the thermosensitive recording layer) and an absolute value of (the minimum thickness of the thermosensitive recording layer—the average thickness of the thermosensitive recording layer) is selected, and the edge of the thermosensitive recording layer is a region of the thermosensitive recording layer that is 3 mm inside from a printing edge of the thermosensitive recording layer.

A thermosensitive recording medium, comprising:

• a support;
• and
• a thermosensitive recording layer disposed on or above the support,
• wherein the thermosensitive recording layer includes an electron-accepting compound, where a solubility of the electron-accepting compound to 100% ethanol at 20° C. is 5.0% by mass or less.