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A plain triangle of three straight lines, without arrowheads.
Also known as: Plain resin triangle, Solid triangle code border, Non-arrow resin triangle, Triangle without arrows
The resin codes were originally drawn inside a chasing-arrows triangle, and ASTM replaced the arrows with plain lines in 2013 — deliberately, because the arrows implied recyclability the code had never asserted. It is one of the clearest cases anywhere of a symbol being changed because it was being misread.
Denotes the border form adopted for resin identification codes in 2013: three plain straight lines rather than chasing arrows.
Contexts: Packaging
Was changed deliberately because the chasing-arrows form was widely read as a recyclability claim that the code has never made.
Contexts: Packaging
Coexists with the older arrowed form, which remains on tooling and packaging in circulation, so both appear on products today.
Contexts: Packaging
An equilateral triangle formed from three plain straight strokes with rounded corners and no arrowheads, enclosing a numeral.