Temperapaste and acrylic are both opaque paints that create marks of solid colour. Tints, tones and shades can be created by mixing colours with white, grey or black.
They can be used on white, coloured or black paper and have the advantage that mistakes can be painted over.
There are many different painting techniques. Some artists apply dark tones first and work to light. Some work light to dark and others apply mid-tones first.
There are wet-on-wet techniques and dry brush techniques, various ways of using brushes, as well as impasto techniques using palette knives.
Temperapaste
Temperapaste is available in solid blocks, tubes and tubs. It is soluble in water, even when dry.
Acrylic
Acrylic paint is available in tubes and tubs. It can be applied thickly or thinly and dries quickly.
Acrylic is permanent when dry so it can't be diluted again with water.
Techniques
Water down tempera or acrylic to create transparent effects
Scratch into paint once it has dried
Use a little paint on a dry brush to bring out textures in your paper
Add matte medium or texture gels to acrylic to make creative effects
Try applying thick acrylic with a palette knife to create an impasto effect