Value Compression:
An explanation on how to use value compression.
value_compression.pdf

Value Scales:
You can use this file to print your value scales from 0 - 19.
Save the file to a USB stick or CD and take it to a photo printing shop and print it at 8" x 12".
Cut the image up into 4 equal sized strips and use a hole punch to punch holes in each value.
Value Scale

Value Compression Software:
You can also download software that will automate value compression rather than looking up tables.
This will only work on a Windows operating system.
If you are using a Mac, I believe there is software that will allow you to run Windows software although I don't know much about it. The file is downloadable from this page:
value compression software

Triangle colour maps, Pigment, Additive and Subtractive triangles:
This explains how to use the colour triangles to mix pigments, and to calculate the resulting colour you would get when using different coloured light sources on coloured objects.
colour_triangles.pdf

Practice Colour Triangles:
This PDF contains colour triangles that you print out to draw on when calculating the colours you want to mix.
practice triangels.pdf

Medium:
This is the medium that I use for glazing and adding to paint to make it more liquid.

I didn't use stand oil in the class but it increases the strength of the paint film, makes it more leveling and decreases yellowing.
Odourless mineral spirits is fine and we used Gamsol in class.
The linseed oil should be alkali refined or cold pressed.
The bee's wax will give a satin finish, much the same as paint from the tube dries. Without it, after enough layers, the film becomes glossy and subsequent paint will not stick to it. Some recipes use damar instead, but I find this goes tacky too soon and you also need to use gum turpentine as the solvent.
You only need enough drier to make it touch dry in one to two days. Too much is bad for the paint.

Appendix:
For those interested in a little added perspective, I have included a couple of extra PDFs.

Arbitrary Vanishing Lines:
Given an arbitrary line that is vanishing to a VP, this is a geometrical way to find a line that would recede to the second VP. That is, a line that is at 90 degrees to the first.
arbitrary vanishing lines.pdf

Converging Vanishing Lines:
If you have two lines running to a VP that is impossible to reach, this is a geometrical way to draw a third line from a given point that will recede to the same VP.
converging lines.pdf