Tinted and/or shaded lens and process for tinting a tinted and/or shaded lens

A lens tinted and/or shaded according to a particular and predefined shape having at least a first colour zone (A) and at least a second colour zone (B) and/or at least a third shaded zone according to a gradient (C) of transition from colour (A) to colour (B), said at least a second colour zone (B) and/or said at least a third shaded zone according to a gradient (C) being obtainable by subjecting a lens of colour (A) to a process including the following steps:

• a. positioning a plurality of lenses on at least one frame, arranging said at least one frame above a colouring tank or bath, said at least one frame being vertically movable along a first vertical axis z1 and a second vertical axis z2, the stroke of z1 being greater than the stroke of z2, said at least one frame also being rotatable about an axis of rotation (R), perpendicular to said axes z1 and z2, and parallel to the free surface of the bath;
• the shape on the lens being obtained by a combination of movement according to the axis z1 and/or according to the axis z2 and/or according to the rotary axis (r) or the rotation direction (R).