Tin lead coatings applied to a base metal either by hot dipping or electroplating. The tin content of the coating is usually between 7% and 25%. Metals coated in this way have been used since the early 1800s. Terne (French) means dull describing the different appearance from the brighter tin plate. The early production of terne plate was tin plated wrought iron dipped in molten lead used in the building industry for roofing and rainwater goods. Terne plate is usually painted to increase its performance.