硫黄谷12号
Iwodani No. 12Operated by · 霧島ホテル
- Color
- colorless and transparent, with a metallic taste and a faint metallic smell
- Taste
- metallic
- Odor
- faint metallic odor
Sodium Sulfate 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
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Sensitive-skin cautionbroken or dry skin
Iwodani No. 12 is a simple acidic thermal spring, sharply acidic at pH 3.0 at the wellhead so it feels faintly prickly on the skin, and classified as a hot spring at a wellhead temperature of 61.9 °C. It is unusually rich in metasilicic acid at 232.9 mg/kg, which leaves the kind of thin silica film that makes skin feel noticeably smoother afterwards. The water is colorless and transparent but carries a metallic taste and a faint metallic odor.
Sampled at wellhead·Analyzed Dec 24, 2021·株式会社東洋環境分析センター·Cert no. 鹿児島県第4号