NOVELTY - Saponification solution produced by either 25% concentrated sodium hydroxide alkaline solution using electrolyte in an electrolytic apparatus by dissolving 25% concentrated sodium chloride to produce fatty acid and saponification reaction solution; or 25% concentrated potassium hydroxide alkaline solution using electrolyte in an electrolytic apparatus by dissolving 25% concentrated potassium hydroxide to produce fatty acids and saponification reaction solution, are claimed.    USE - The solution is useful for producing soap to prevent atopic dermatitis (claimed).    ADVANTAGE - The soap has no side effect for skin and eyes, and is natural and environmentally friendly.    DETAILED DESCRIPTION - Saponification solution produced by either 25% concentrated sodium hydroxide alkaline solution using electrolyte in an electrolytic apparatus by dissolving 25% concentrated sodium chloride to produce fatty acid and saponification reaction solution; 25% concentrated potassium hydroxide alkaline solution using electrolyte in an electrolytic apparatus by dissolving 25% concentrated potassium hydroxide to produce fatty acids and saponification reaction solution; or 9% concentrated alkaline solution by dissolving sodium bicarbonate (baking soda), soda or baking powder in water to produce fatty acid and saponification reaction solution. INDEPENDENT CLAIMS are also included for: (I)soap composition comprising a fermented herbal medicine extract produced by mixing 50 wt.% extract A (obtained by mixing 50 wt.% Schizonepeta tenuifolia, 10 wt.% Cinnamomum cassia, 10 wt.% Saururus chinensis, 10 wt.% Sophora flavescens, and 10 wt.% Glycyrrhiza uralensis with water (10 times of total herb) and ultrasonic extracting at 60 degrees C for 6 hours), with 50 wt.% extract B (obtained by mixing 20 wt.% Ulmus davidiana, 20 wt.% Rumex crispus, 20 wt.% Rhododendron brachycarpum, 20 wt.% Luffa aegyptiaca, 20 wt.% Glycyrrhiza uralensis with water (10 times of total herb) and ultrasonic extracting at 60 degrees C for 6 hours), and fermenting by adding 3 wt.% molasses, 1 wt.% salt and 3 wt.% effective microorganism made of photosynthetic bacteria, lactic acid bacteria, yeast and Actinomycetes at room temperature for 10 days; or composition obtained by ultrasonic extracting 50 wt.% silkworm with 98% ethanol at 40 degrees C for 6 hours; and #(II)producing soap, comprising either heating 250 g gross weight (obtained by mixing 100 g fermented herbal medicine extract with 150 g alkaline solution) with 750 g oil solution (obtained by mixing 200 g coconut oil, 180 g palm oil, 160 g olive oil, 90 g rice bran oil, 60 g tamanu oil and 60 g evening primrose seed oil) at 45 degrees C in electric heater, stirring for 3-5 times, performing saponification trace reaction, adding the reactant with 10 g silkworm extract, 5 g vitamin E, 10 drops of propolis, 5 g ceramide, 10 g lavender essential oil and 10 g red clay, stirring the mixture, molding into soap shape, performing fermentation thermal reaction for 2 days at room temperature, and drying the soap for 4 weeks.