彩光の湯
Saikō-no-Yu SpringOperated by · 中村睦子
Sampled at wellhead
曹
Bicarbonate
+ Sulfate
Classification
Sodium Bicarbonate-Sulfate spring
A sodium-led bicarbonate spring with sulfate quietly filling out the body — the classic jūsō-sen style emerging hot at 56 degrees Celsius. At the wellhead it carries a faint sulfur note and a slight metallic edge on the tongue, while a neutral pH keeps the touch soft and places it in Japan's beauty-water family. A generous 168.8 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother afterwards.
pH
6.80
Neutral
Source temperature
56.4°C
Hot
Tonicity
1.35g/kg
Hypotonic
Free CO₂
75mg/kg
Low
Radon
10Bq/kg
Low
- Color
- colorless and transparent
- Taste
- very faint metallic taste
- Odor
- faint sulfur
Highlights
- High silica
Analyzed Oct 28, 2011·宮崎県衛生環境研究所·Cert no. 宮衛環研温第301号