Dissolve and mix approximately 40g (approximately 2.5 tablespoons) in 200L of hot water in your home bathtub. In rare cases, pebbles or other foreign objects may be present. We recommend dissolving the salt in a washbasin beforehand and removing any sediment before adding it to the bathtub. Fine sediment from the rock salt may form at the bottom of the bathtub. After bathing, drain the water and thoroughly rinse the bathtub and surrounding area. Do not use in marble or enamel bathtubs. Remove any precious metals before bathing to prevent deterioration. Due to the rock salt's components, a sulfurous smell reminiscent of hot springs may be detected as it dissolves. In metal bathtubs, change the water every time and adjust the amount used accordingly. Do not use in 24-hour baths (circulating bathtubs). This salt is not suitable for consumption as it has not been processed to be used as edible salt. Do not use leftover water for laundry. Keep out of reach of children. Use with caution, checking for any skin irritation. If the cosmetics do not suit your skin, that is, in the following cases, discontinue use. Continuing to use the product may worsen the symptoms, so we recommend consulting a dermatologist. (1) If you experience any abnormalities such as redness, swelling, itchiness, irritation, discoloration (white spots, etc.), or darkening during use. (2) If the above abnormalities occur after direct sunlight exposure to the skin where the product was used. Do not use on areas with cuts, swelling, eczema, or other abnormalities. If the product gets into your eyes, rinse immediately. We cannot be held responsible for any accidents or problems arising from use outside of bathing. After use, seal the container tightly and store away from humidity. The product may harden due to humidity, but this does not affect the quality, so please break it up before use.