Tinplate
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Tinplate was formerly a widely used material. Its main use today is for tin cans. It consists of sheet steel covered with a thin layer of tin. Before the advent of cheap mild steel, the metal used was iron.
Tinplate is made by rolling iron or steel in a rolling mill, cleaning it of scale (rust) by pickling it in acid and then coating it with a thin layer of tin. This was formerly carried out by producing the plates (or small groups of them) individually in what was subsequently known as a 'pack mill'. These began to be replaced from the late 1920s by 'strip mills' which produced a larger quantity at once.
Formerly, tinplate was used for cheap pots, pans and other holloware, but galvanised vessels (coated with zinc) are now used. This is because zinc protects iron electrolytically, the zinc being dissolved in preference for iron, whereas tin will only protect the iron if the tin-surface remains unbroken. This is why it is not safe to eat food from a rusty tin can.
This kind of holloware was also known as tinware and the people who made it were tinplate workers.
History
The practice of tinning ironware to protect it against rust is an ancient one. This may have even the work of the whitesmith. This was done after the article was fabricated, whereas tinplate was tinned before fabrication. Tinplate was apparently produced in the 1620s at a mill of (or under the patronage of) the Earl of Southampton, but it is not clear how long this continued.The first production of tinplate was probably in Bohemia, from where the trade spread to Saxony, and was well-established there by the 1660s. Andrew Yarranton and Ambrose Crowley (a Stourbridge blacksmith and father of the more famous Sir Ambrose) visited Dresden in 1667 and found out how it was made. In doing so, they were sponsored by various local ironmasters and people connected with the project to make the river Stour navigable. In Saxony, the plates were forged, but when they conducted experiments on their return to England, they tried rolling the iron. This led to the ironmasters Philip Foley and Joshua Newborough (two of the sponsors) in 1670 erecting a new mill, Wolverley Lower Mill (or forge). This contained three shops, one being a slitting mill (which would serve as a rolling mill), and the others were forges. In 1678 one of these was making frying pans and the other drawing out blooms made in finery forges elsewhere. It is likely that the intention was to roll the plates and then finish ethem under a hammer, but the plan was frustrated by one William Chamberlaine renewing a patent granted to him and Dud Dudley in 1662.P. J. Brown, 'Andrew Yarranton and the British tinplate industry' Historical Metallurgy 22(1) (1988), 42-8; P. W. King, 'Wolverley Lower Mill and the beginnings of the tonplate industry' Historical Metallurgy 22(2) (1988), 104-13.
The slitter at Wolverley was Thomas Cooke. Another Thomas Cooke, perhaps his son, moved to Pontypool and worked there for John Hanbury.King, 109 He had a slitting mill there and was also producing iron plates called 'Pontpoole plates'.H. R. Schubert, History of the British iron and steel industry ... to 1775, 429. Edward Lhwyd reported the existence of this mill in 1697.Minchinton, 10. This has been claimed as a tinplate works, but it was almost certainly only producing (untinned) blackplate.
Tinplate first begins to appear in the Gloucester Port Books (which record trade passing through Gloucester, mostly from ports in the Bristol Channel in 1725. The tinplate was shipped from Newport, Monmouthshire.Data extracted from D. P. Hussey et al., Gloucester Port Books Database (CD-ROM, University of Wolverhampton 1995). This immediately follows the first appearance (in [[French language
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