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The complementary nature of these spectroscopic techniques have made it possible to evaluate the state of conservation, to establish measures to clean the existing efflorescence according to their nature and to suggest dating of the materials.
In the case of the larger firms the mark also has publicity value and shows the buyer that the object was made by a long-established firm with a reputation to uphold; such clear name- marks as Minton, Wedgwood, Royal Crown Derby and Royal Worcester are typical examples.
The type of body, glaze, styling and decorating technique will be your best clues to identifiying an unmarked piece of pottery.'England':- Inclusion of the word 'England' in marks denotes a date after 1891, although some manufacturers (Thomas Elsmore & Sons for example) added the word slightly before this date. It was William Mc Kinley (the 25th president of the USA) who introduced the highly protectionist Mc Kinley Tariff Act of 1890 - this imposed tariffs on many imports (including pottery) in order to make it easier for the American manufacturers to sell their products.It was a requirement of this Act that all such imports carried the name of the country of manufacture.As manufacture in China,we don't touch plant or extractions.It's our responsibility to provid you consumer usable,high-end solutions which allows our customers to do their speciality and just leave the hardware to us.