Colour Classification Theories

In the aquatint process, the plate is placed in a rosin box where rosin particles are evenly distributed over its surface. Heat is then applied to melt the particles, which adhere to the plate and act as a resist during acid etching.

• Step 1: Rosin particles are distributed evenly using a rosin box.
• Step 2: Heat melts the rosin, adhering it to the plate.
• Purpose: The rosin acts as a resist, allowing controlled acid exposure to create tonal effects.

This technique helps achieve tonal effects by controlling the acid's exposure to the plate.

In the dry point technique, a sharp needle is used to scratch the surface of a metal plate, creating an incision. The burr, a thin metal ridge raised on either side of the line, traps the ink, resulting in rich, velvety textures in the final print.

• Tool: A sharp needle is used to create incisions on the metal plate.
• Burr effect: The raised metal burr traps ink, adding texture.
• Unique feature: Produces rich, velvety textures that distinguish it from other intaglio techniques.

Tones and tints are key concepts in colour theory. A tint is created by adding white to a colour, making it lighter, while a tone is created by adding grey to a colour, reducing its saturation. These methods help artists manipulate colour to create depth, highlights, and shadows in their work.

• Tint: Adding white to lighten a colour.
• Tone: Adding grey to reduce a colour's saturation.
• Purpose: Used to create depth, highlights, and shadows in art.