TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Solvent: The core agent solvent is n-hexyl alcohol and n-tridecane. Preferred Properties: The capacitance ratio of n-hexyl alcohol and n-tridecane, is 1:99. The hydrophilic lipophilic balance (HLB) value of the emulsifier is 8-15. The boiling point of the volatile solvent is less than 100degreesC. EXAMPLE - 500 mug of chlorophyll group pigment of formula (I) was dissolved in 5 mum of n-hexyl alcohol as core agent solvent. The mixture was further mixed with n-tridecane as core agent solvent, to form 0.5 ml of core agent solution having capacitance ratio of n-hexyl alcohol and n-tridecane of 1:99. A shell agent solution of 20 weight% (wt.%) concentration, was prepared by dissolving a polyfunctional isocyanate addition product in methylene dichloride. The core agent solution was mixed with 3 ml of shell agent solution and stirred at 25degreesC for 5 minutes and uniform solution was obtained. 1 wt.% of aqueous solution of gelatin (15 ml), and 4 wt.% of aqueous solution of dispersing agent of octyl phenol ethylene oxide addition product having hydrophilic lipophilic balance (HLB) of 13.5 as emulsifier, were mixed and stirred for 5 minutes to form emulsifying-dispersing aqueous solution. The emulsifying-dispersing aqueous solution was maintained at 40degreesC in a thermostat. The uniformly mixed solution was dropped to the emulsifying-dispersing aqueous solution, so that oil in water (O/W type) emulsion was obtained. Methylene dichloride was evaporated and temperature of thermostat was maintained. The mixture was stirred vigorously for 1 hour after dropping. The temperature of the thermostat was lowered to room temperature and stirred vigorously for 12 hours or more. The shell agent was cured and O/W emulsion in suspension condition was obtained. The stirring was stopped and the suspension aqueous solution containing microcapsules was centrifuged, and aqueous layer and microcapsules layer were separated completely. The upper layer was colorless and transparent, and a microcapsule layer was isolated from the lower layer. The gelatin on the microcapsule surface was removed by washing several times with warm water. The microcapsule was separated in arbitrary size according to the weight difference of microcapsules. The microcapsule had size of approximately 1 mum. The presence of chlorophyll group pigment (I) in the core portion of the microcapsule was confirmed by fluorescence spectrum.