Key Features:
Transparency: Layers remain see-through, allowing underlying colors to glow.
Fluidity: Water controls pigment flow, creating soft blends or crisp edges.
Portability: Solid pans or tubes are ideal for outdoor sketching.
Versatile Techniques: Salt, alcohol, or masking fluid can add texture.

Common Uses:
- Landscape, botanical, and expressive art
- Illustration and comic coloring
- Architectural draft rendering
- Art therapy and journal decoration