sunfast

The fabric is sunfast and retains its color after many days outdoors.

Definition

1. Adjective:
   • Resistant to fading from sunlight: "sunfast" describes a material, especially a dye or fabric, that does not lose its colour when exposed to sunlight over time.

Usage Examples

• (The fabric is resistant to sunlight damage.)
• (The ink is designed to resist fading from sun exposure.)

Advanced Usage

• "sunfast property": the quality of a substance to maintain its colour under sunlight.

  • The sunfast property of this paint makes it suitable for exterior walls. (The paint resists fading due to sun exposure.)

• "sunfast dye": a dye specifically formulated to be resistant to sunlight.

  • Manufacturers use sunfast dyes to ensure that clothing colours remain bright after repeated outdoor wear. (Dyes that do not fade in sunlight.)

Variants and Related Words

• Sunfastness (noun): the quality or state of being sunfast.

  • The sunfastness of the material is tested by exposing it to intense sunlight for several weeks. (The ability to resist fading.)

• Lightfast (adj): a related term meaning resistant to fading from any light, not just sunlight.

  • This artwork uses lightfast pigments to preserve its colours. (Pigments that resist fading from light.)

Synonyms

• Fade-resistant: not prone to losing colour over time.
• Colourfast: resistant to fading or running, often used for textiles.

Related Idioms

• (No common idioms directly contain "sunfast," but the concept is often expressed in technical or commercial contexts, such as "sunfast guarantee" or "sunfast warranty," meaning a promise that the product will not fade in sunlight.)
  • The company offers a sunfast guarantee on all outdoor upholstery. (A warranty that the fabric will resist fading from sun exposure.)