Provided are a method for reusing recording media in repeated sequential processes of image forming and erasing, reusable recording media suited to the method, a method for producing the reusable recording media and an image forming apparatus with a control unit to feed the recording media. The recording media are reused in a way that forming an image on a recording medium by use of an image forming material, and, removing the image forming material from the recording medium through thermal transfer by use of a peeling member, wherein the recording medium is a paper produced through a step of applying a treatment liquid at size pressing after paper making and then drying the treatment liquid, the treatment liquid comprises a water-soluble or water-dispersible polymer having an alkyl group with a carbon number of 8 or more at its side chain as an image-repellent substance.
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