Amateur

Hello, Am not sure if I can send image of leaf bowl in question. The Chinese were able to produce tea bowls with the image of a leaf on the bowl. As I understand it the leaf was covered with a clear glaze and then put on the tenmoku glazed bowl and then high fired. The result was an image of the leaf on the bowl. I tried this alleged method but the result was disappointing. Does anyone have an idea as to how this was done? Thanks, Anthony