They practice their craft on everyday items, and before embarking on a conservation job they always test the object first and do little "dry runs" to make sure no problems will crop up.
而除了平日常拿一些民間毀損的文物來「練功」外，在每一次修護工作展開前，還要先作測試，從小範圍試起，等確定沒問題了才會正式施作。