Often some of these pieces were heavily used over the years and the Ceramic Restoration Professional will find a multitude of issues in removing stains of various kinds.
This Touraine Platter by John Alcock c.1800s, was obviously used to serve fatty meats beyond its time which through the years crept slowly into the glaze and actually into the crazing. Those tiny little lines that authenticate that the piece is old. This demonstrates an extreme example of exudates that can lay beneath the surface.
This is what actually exuded from this platter after the first round of cleaning, proving materials have gone far below the surface of your ceramic pottery.
Crazing Before 1st Cleaning
Just to further the discussion regarding the cleaning of ceramics we will show you the progression of the Touraine Platter cleaning process.
The platter was washed, cleaned and returned to a Chemical Solution for another bath for several days. This process will be repeated as needed depending on the specific issues presented by the condition of the ceramic and the cause of the staining. After several cycles being completed the result can continue to produce material to rise to the surface....................
You will notice that during the cleaning process a previously colored chip on the edge of the platter is exposed.
And after further bathing... the front looks fairly good right?..Look at the back! (mouse drag) It just keeps comming, which is a very good thing as now it is just a matter of patience to resolving the stains, fill and color the chip return this platter back to its original beauty. This platter will be fully restored to original appearance.