Collector's seals affixed to works in the imperial collections usually indicate the reign date, while private collector's seals may show the individual's personal name or the name of his studio, or contain some cautionary phrase such as "to be treasured eternally by sons and grandsons" or "not to be lent out to others."
收藏印如果是蓋在皇帝的收藏品上，則多刻年號；私人收藏則刻姓名、別號、齋館名稱，或是「子孫永寶」、「勿以借人」之類苦口婆心的字樣。