Kashering porcelain

Hi,

Expensive porcelain dishes which have not been used in more than 12 months may be kashered via three successive acts of hagalah, in a case in which this will aid people in becoming observant of kashrut.

(Rav Moshe Feinstein, Igrot Moshe Yoreh Deah 2:46)

Have a great day,
Mordechai