This example makes use of the principle of 'aging'. Important areas for shading are the eye sockets, the temples, the side of the nose and below the cheekbones. You draw the lines with a flat sable-hair brush. By placing it obliquely on the skin you get a sharp edge on one side and a fading effect on the other side. To determine which side should be sharp and which side faded, you start from the centre of the face (nose). Create a fading effect towards the outside. The lines from the eyes towards the forehead (vertical frowning wrinkles) and the naso-labial ('nose-lip') fold are therefore sharp in the direction of the nose and more blurred towards the outside. The naso-labial fold is easier to locate if one grimaces. The length of this line also determines the character to be made up (the longer, the more severe). Bags under the eyes are sharp on the lower side and must be faded towards the upper side.
The parts of the face that have not been shaded now seem to have been brought forward.