tinfree en · ADJ
Etymology
From tin + -free.
Meanings
-
(not-comparable) Not containing tin metal.
The same steel substrate used for tinplate may instead be coated with a layer of hydrated chromium oxide and chromium metal via electrodeposition, when it is known as tinfree steel.
2012, E. M. Willhoft, Aseptic Processing and Packaging of Particulate Foods, page 44: