下呂温泉
Gero Onsen湯
Simple
Sodium Chloride spring
Hot source · 56°CHigh silicaTop-decile alkaline
Composition fingerprint0.3 g/kg dissolved · Hypotonic
Na⁺90
Cl⁻30
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
An alkaline simple thermal spring from Gero Onsen. At pH 9.1 it sits well into the alkaline range, giving the slippery beauty-water feel that smooths the skin. The water is lightly mineralized at 340 mg/kg, so it stays gentle on the body, while a generous 65.9 mg/kg of metasilicic acid leaves a thin silica film that makes skin feel noticeably smoother afterwards.
Analyzed Dec 3, 2018
