Taint/Tabor is the ISRI code for clean mixed old alloy sheet aluminium. It consists of post-consumer sheet in two or more wrought alloys, for example cladding, panels, utensils, signboards and body sheet. The specification limits oxide and dirt, and excludes foil, hair wire, wire screen, food or beverage containers, radiator shells, airplane sheet, bottle caps, plastic, iron and other non-metallic items. Low-copper material is preferred.
Why it matters when buying
- Because it is mixed alloy, its chemistry is less predictable than segregated scrap; ask for a spectro check of representative pieces.
- Painted or coated sheet lowers recovery and adds fumes; agree how much coating is acceptable.
- Look for attached iron (rivets, frames), plastic films and insulation, all forms of contamination that should be deducted.
- Thickness matters: very thin sheet oxidises more in the furnace.
Typical uses
Taint/Tabor is a common feed for secondary smelters making casting alloys and for remelters producing deoxidiser grades. Higher-quality, segregated lots can go to wrought alloy production. See the scrap grades guide and scrap listings.