Get through that covering layer and the underlying slivery colour of the aluminium itself will show through the black layer.
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2.
With its underlying jade-like green colour, celadon fired by the family-oriented businesses of Longquan is prized as masterwork-quality art that can also serve as household ware.
UNESCO: Culture
3.
This methylation pattern played as great a role in determining a mouse's coat colour as did the underlying gene sequence.