Slumping? Slumping the glass means getting it to take shape of a mold. Meaning that you must melt the glass in order for it to take the shape of the desired template. Process: My plate was made by cutting one big background color, in my case I used white. Once this was cut, I moved on to individually cutting the ten black squares I wanted to use. I also cut the black triangles, green midsection and fit the stringers to size. Once I was done cutting the shapes I glued all of them together with glue. Once that was done the plate when through one firing to make the shapes become stuck to one another. After that the plate was fired with the template I wanted, so the glass got slumped.