How should the soap be used correctly in a sauna or bathhouse? — Black shungite soap for bath and sauna 500g – Fratti

According to the card, this is a soap for the bathhouse and shower. The card does not describe the method of use, the amount, the time to leave it on the skin or any specifics of use in a sauna or bathhouse; there are no warnings on the card.

General information (not a manufacturer's instruction): liquid soap is applied to damp skin and rinsed off with water; avoid contact with the eyes, and if irritation occurs the soap is not used.