This chart shows the pencil hardness or softness used to obtain each value on the scale.
Colored Pencils for Adults
4 Basic Pencil Shading Techniques - I wish I had this when I was an art major
Graphite Drawing Pencil Grades Chart
Projects to Try
How to draw an eye
Art & Media
Lighthouse - pencil drawing
Learn drawing shading techniques with this free guide
Sketch Book Exercise – Three Dimensional Pyramids | Carol's Drawing Blog
High School Art Lessons 2
The use of light and dark shading helps to communicate the smooth texture of the object and the way in which light is reflected off it.
shading techniques for tonal variations
fashion illustration - shading