One important prerequisite for outstanding products is high-quality materials such as the selected French calfskin that the products in the Graf von Faber-Castell Collection are made from. Tough but supple, strong yet with a certain amount of 'give', calfskin is a material that lends itself to fine crafting. The leather is butt-jointed by hand. Particular precision is needed for the threads in a contrasting colour: every stitch must be perfect. We use grained leather for the outer surfaces and usually smooth leather on the inside - a combination with an appealing visual effect. All the products are available in a choice of black or brown.