A silver halide photographic emulsion comprising silver halide grains, wherein 50% or more of the total number of all the silver halide grains are occupied by tabular grains satisfying the following requirements composed of silver iodobromide or silver chloroiodobromide, and having faces as main planes, having an equivalent circle diameter of 1. The locking ring is suitable to contract out of a groove in an opening in the pipe, vessel, or hub extending therefrom into an unlocking position and is suitable to expand wherein an outer portion of the locking ring extends into the groove in the opening in the pipe, vessel, or hub extending therefrom into a locking orientation. The coloring conversion unit converts a coloring state of the image of the temperature-sensitive ink by heating or cooling the image of the temperature-sensitive ink.