Image forming method and image forming material

An image forming material for use in an image forming method, the image forming material comprising an aqueous dispersion containing an electrodeposition material including:

• a fine particle coloring material;
• and
• a polymer which is chemically dissolved, or is deposited and precipitated, by a change in pH, and the aqueous dispersion is prepared in a liquid in a vessel and the vessel having therein:
• an image supporting member including at least:
• an electrode which can supply current or an electric field in accordance with an image pattern, and a surface which can support an image;
• and
• a counter electrode which forms a pair of electrodes together with the electrode;
• wherein the electrodeposition material is deposited and precipitated to form an image by supplying current or electric field in accordance with an image pattern to the image supporting member and the counter electrode and by changing the pH value of the aqueous dispersion in the vicinity of the image supporting surface of the image supporting member;
• wherein the polymer included in the electrodeposition material has both hydrophobic groups and hydrophilic groups in the molecule, the proportion of the number of the hydrophobic groups to the total number of the hydrophobic groups and hydrophilic groups in the polymer is in the range of from 40% to 80%, 50% or more of the hydrophilic groups can reversibly change from hydrophilic groups to hydrophobic groups due to a change in pH value, and the acid value of the polymer is in the range of from 30 to 400.