黒川温泉 山河旅館 低温源泉
Kurokawa Onsen Sanga Ryokan Lower-Temp SpringOperated by · 旅館 山河
Sodium Sulfate-Chloride spring
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
The lower-temperature wellhead at Sanga Ryokan in Kurokawa Onsen (49.3 °C). Lightly mineralized at 757 mg/kg, this simple sulfur spring of the hydrogen sulfide type carries 4.3 mg/kg of free H₂S — enough to lend the bath a soft rotten-egg note. Neutral pH keeps the feel gentle; metasilicic acid at 67 mg/kg adds a touch of skin-smoothing softness.
Analyzed May 15, 2002·社団法人 熊本県薬剤師会薬品検査センター