If an acidic porcelain etch is spilled on a arm What should be done first?

酸性の磁器エッチが腕にこぼれている場合、最初のステップは、少なくとも15分間、大量の水で患部をすぐに洗い流すことです。 This will help to dilute the acid and minimize its contact with the skin. While rinsing, remove any clothing or jewelry that may be contaminated with the etch.

Once the area has been thoroughly rinsed, it is important to neutralize the acid.これは、重曹（重炭酸ナトリウム）やマグネシアの牛乳（水酸化マグネシウム）などの弱い塩基を患部に適用することで行うことができます。 The base will react with the acid to form a salt and water, which can then be easily rinsed off.

After the acid has been neutralized, the area should be washed with soap and water and patted dry. If there is any pain or irritation, a cold compress can be applied to help relieve these symptoms.

It is important to seek medical attention if the acidic porcelain etch has caused any significant burns or skin damage. A healthcare professional can assess the extent of the injury and recommend the appropriate treatment.