It has likely helped to preserve the dish from excessive chips and other damage. The plate is in very good condition for age.
But there is some wear, 2 small chips, and iron spots. All are in line with the age. An almost identical plate is in the Elim Museum collection and can be found at.
A bowl of the same style and decoration was recently auctioned June 2018. The plate measures approximately 7.5 inches. It has been photographed in varying degrees of light to highlight details. The item "Qianlong Period Pink Monochrome Plate" is in sale since Tuesday, April 9, 2019. This item is in the category "Antiques\Asian Antiques\China\Plates".The seller is "delightful_discoveries_by_sns" and is located in Bowie, Maryland. This item can be shipped worldwide.