STEP 1.This is a human face from the front view. Start by drawing a oval for the human head, put the guides for face as sample shows here. This will lay as your foundation to proportion the face correctly.
STEP 2.Now, add a few guide lines here for the face. Draw 5 horizontal lines (eyes line -green and black color included )and 1 blue mouth line. 2 vertical line (right side and left side ), eyes ball in center with the green line. The lines aren't totally necessary but are preferred in order to keep the face in tune.
STEP 3.It's time to calculate the position of the eyes, nose and mouth. These lines are just a few pointers to knowing the distances between each feature.
STEP 4.For the human eyes position, always keep remember the 5 eyes spacing for the face, the pick screen color are the position of the eyes, nose (blue color shape) in the center between the eyes, mouth line below the nose. ear line center with the eyes line ( when we wear the glasses) and the ear line end with same the nose line (remember it), i call all done here like "human face formula sketch "here.
STEP 5.okay, Now i start using the black line sketching the whole head line, eyes, nose, ear and mouth according the human face formula sketch here.
STEP 7.Sketching the shadow for eyes, nose, ear and mouth here, you can see a realistic female face appeared.
STEP 8.Use your pencil and shade in the hair to have a finalized result of a human face. It takes time to create a good looking face. Don't get too rushed when you start drawing the hair.
STEP 9.This is another side for the human face for female. I start with 2 ovals and 1 neck line here. No.1 is the skull, which takes majority of the head. No.2 is the space to draw the face. No. 3 is the neck line so you can proportion the head on the neck right.
STEP 10.Circle out the line here for head; add the face line, 3 eyes spaces according the angle, triangular shape for nose, a line for mouth.
STEP 12.Painting the detail and shadow for eyes, nose, mouth and using various graphite pencils. If you have a digital program, use a customized brush for the hair.
STEP 13.An important part for when you are shading is to depict where the light source is hitting your figure. In this case, it's from the front, contrasting lots of shadows in the mid section of the face rather than the sides. When someone is smiling, they have deep creases in the cheeks, lifting them outwards.
source : http://www.dragoart.com