Ceramic glazes contain silica to form glass as well as metal oxides, clay and colourants. But I sometimes like to use real mosaic glass tiles for a stronger effect. When the bowl or plaque is fired in the kiln, the glass will melt and create beautiful patterns.
You will need to make a little hole in the bottom of your clay bowl to contain the glass tiles
I use an edging tool to scrape away the surplus clay while the bowl is still leather hard.
Real ferns can be used to impress the clay – they can be left in the bowl during the firing as they will simply burn away and leave their imprint behind. The bowl sold before I had a chance to photograph it, unfortunately.
I plan to run a workshop exploring this method in November – it will soon appear in my workshop diary