plane blades France

...These hand-forged scissors have been shaped on the anvil or under the hammer by the cutler, who only has one tool for control: his eye. The inner face of the blades is called the plane. When the scissors are closed, the planes do not touch along their entire length: they have a very slightly concave shape. This is referred to as the 'envoilure,' which affects the quality of a pair of scissors. The envoilure is very noticeable on scissors with long blades.