| http://www.w3.org/ns/prov#value | - Therefore, the chromogenic reactiontakes place between the outflowing dye precursor and the developer material, &o thereby form a visible image on the developing medium.However, conventionally, it has been necessary to use the developing medium which is produced by a paper making company and it has been impossible for the user to freely use various kinds of papers for forming the visible output im
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