In the resin film forming method for extruding a fused resin from an extruder die to form a resin film, the second resin forming both ends in width direction of the resin film uses a resin greater in extension viscosity than the first resin forming the center in width direction of the resin film. A color of a patch of a color chart is measured to obtain a colorimetry value, and the color chart is photographed by a television camera to obtain RGB data. The socket wrench has an elongated handle with a box head. The method further comprises filtering the received content items to remove content items having social quality scores below a predetermined threshold.