Abstract: A fluorescent material includes at least one fluorescent compound having a structure formula of ABXZY3-Z as defined in the specification, a plurality of NH3+ group-containing ions bound to the fluorescent compound through protonation of amine groups of an amine composition, and a plurality of COO? group-containing ions bound to the fluorescent compound through deprotonation of carboxyl groups of an acid composition. The amine composition has a total hydrogen bonding Hansen solubility parameter (T?H) ranges from 2.4 to 3.3 (cal/cm3)1/2, and the acid composition has a total polar Hansen solubility parameter (T?P) which is less than 1.4 (cal/cm3)1/2.

Abstract: A fluorescent material includes at least one fluorescent compound having a structure formula of ABXZY3-Z as defined in the specification, a plurality of NH3+ group-containing ions bound to the fluorescent compound through protonation of amine groups of an amine composition, and a plurality of COO? group-containing ions bound to the fluorescent compound through deprotonation of carboxyl groups of an acid composition. The amine composition has a total hydrogen bonding Hansen solubility parameter (T?H) ranges from 2.4 to 3.3 (cal/cm3)1/2, and the acid composition has a total polar Hansen solubility parameter (T?P) which is less than 1.4 (cal/cm3)1/2.

Abstract: A toilet flush water supply device for supplying flush water to a flush water tank of a flush toilet is disclosed. The toilet flush water supply device comprises a water supply pipe connected to an external water supply source, a water supply valve for switching between spouting and stopping of flush water supplied from the water supply pipe into the flush water tank, a float for switching between the spouting and stopping of the above water supply valve by a vertical movement thereof linked to fluctuations in the flush water level within the flush water tank, and a float guide disposed on the outer surface of the water supply pipe for guiding the vertical motion of the float.

Abstract: A toilet flush water supply device for supplying flush water to a flush water tank of a flush toilet is disclosed. The toilet flush water supply device comprises a water supply pipe connected to an external water supply source, a water supply valve for switching between spouting and stopping of flush water supplied from the water supply pipe into the flush water tank, a float for switching between the spouting and stopping of the above water supply valve by a vertical movement thereof linked to fluctuations in the flush water level within the flush water tank, and a float guide disposed on the outer surface of the water supply pipe for guiding the vertical motion of the float.