Self-finishing materials are those that develop their final surface appearance naturally through weathering, oxidation or aging, rather than requiring applied coatings or treatments. Self-finishing materials have natural protection, or develop their own protective layer through environmental exposure.
Examples of self-finishing materials
- Copper forms a blue-green patina coating, which actually protects the underlying metal:
- Starts off a shiny, reddish colour
- Reacts to oxygen in the air
- Forms a thin, reddish brown layer that darkens and dulls over years until nearly black, then becomes a richer brown
- Reacts with moisture, carbon dioxide and so on, to form a blue-green patina (this layer is protective and stops further corrosion)
- Process occurs faster in coastal areas, due to the salt and moisture
- Certain timbers like cedar, teak, and saligna contain natural oils and tannins that resist decay, allowing them to weather to a silvery-gray outdoors without requiring stains or sealants:
- Starts off natural wood colour
- Sunlight (UV rays) breaks down the compounds within the wood, so the surface colour begins to fade
- Surface becomes rougher us UV damages surface, and may expand/contract in rain/sunshine
- Timber develops characteristic silver-grey colour, which acts as a protective layer, shielding the wood beneath from further UV damage
The use of self-finishing materials aligns with design movements valuing material honesty and embracing imperfection and the passage of time. These materials are popular in sustainable design because they reduces maintenance and chemical treatments.
Amiria has a Bachelor of Architectural Studies, Bachelor of Architecture (First Class Honours) and a Graduate Diploma of Teaching. She is a CIE Accredited Art & Design and Design & Technology Coursework Assessor. Amiria now teaches Art, Design & Technology at ACG Parnell College.