Michel François bowl inspired by Jianyang's Sung dynasty bowls
This technique creates wonderful effects. These 3 pictures are taken on the same bowl and show that very different effects can be obtained depending on little changes to the glaze or to its location (inside or outside).
Some modern potters are such experts that they obtain almost exactly the same patterns on the whole bowl. While such bowls look spectacular at first, they end up feeling boring and without much personality. What I particularly appreciate on Michel François' Jianyang inspired bowls is the freedom and natural feel of his glaze variations. They are unpredictable and leave a lot of room for imagination.
This particular bowl has a special green glaze obtained naturally from wood ashes.