▎ 摘　　要

NOVELTY - The manufacturing method involves processing graphite with ultrasonic wave in high temperature of more than 60 degrees Celsius in water. The sound pressure of the sonication is 1 kilopascal or greater. The graphene dispersed solution does not include the compound except the graphene or the surfactant. USE - Manufacturing method for a graphene dispersed solution used in the ink (Claimed). ADVANTAGE - The manufacturing method involves processing graphite with ultrasonic wave in high temperature of more than 60 degrees Celsius in water, where the sound pressure of the sonication is 1 kilopascal or greater, and hence ensures improved stability of the graphene dispersed solution. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a substance solution.