Blending - Smooth gradations of value are produced either by adjusting the amount of pressure applied to the medium or by using a blending tool, such a blending stump.
Never use your finger for blending.
The oils in your skin, when mixed with graphite, can ruin the drawing as you rub the graphite into the paper.
That can make the shading look blotchy and hard to erase or correct.
Stippling or pointillism - is a shading technique by applying countless small dots to build up darker values in a drawing.
The density of the dots determines the value produced.
Cross-contour - Contour lines can be done in many different ways but basically the idea is to have the lines follow the shape of what you are drawing to support the form.
And don’t forget that your eraser is an equal drawing tool along with your pencil or charcoal.
Use it for drawing, as well as to create lighter values or erase..
So here are the basic shading techniques!
In the modern age artists use a 10 tone value scale.
Value increases 10% at a time.
Most artists can visualize the scale and use the terms:
“One tone down” or “one tone up” when talking about shading.
Value scale is a great reference tool for choosing the right value.
The same value looks lighter or darker next to different backgrounds.
When shading:
Use different grade pencils for different values.
Pencils marked H H2 H4 and so forth - are hard pencils.
They produce delicate light strokes and are great for light values and details.
Pencils marked from B to 8B are soft.
They produce darker values and are great for sketching
Shading a value scale is a great way to practice your value and shading techniques.
Always start shading with the darkest value.
The darkest value uses your medium to its max.
And you can use it as a reference for the rest of the values.