Last edited 07 Jul 2021



The term 'spangle' describes the crystal-like pattern created on the surface of steel during the process of galvanisation. It may appear in the form of snowflakes, stars or other abstract geometric patterns.

It can occur when certain alloying materials (such as antimony) are added to the galvanisation process or may appear naturally due to impurities in the substances used. Controlling the cooling process can also contribute to the formation of spangles.

Min spangle (or minimised spangle) is a kind of galvanised steel wherein which the spangle pattern is reduced but is still visible. It is also possible to create large spangles, but producing this effect may result in materials that contain lead.

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