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This is fantasy leather. It is made with calfskin and the dot print is applied with a hot plate to the bottom layer of the leather, which is called crust leather. This creates a print with a relief effect. The leather is first coated with a white dye, the black colour of the dots is then applied at the same time as the relief effect is created. Over time, the surface of the part in relief may lose its sheen due to friction, causing the lower layer that is dyed white to emerge more visibly.
Stains can be removed with a slightly damp cloth, but this should only be used on the stain itself, never on the entire surface of the product. It is not necessary to apply a waterproofing protective spray to this type of leather.