银茶壶或不列颠合金茶壶所泡出来的是劣质茶，搪瓷缸泡出来的就更差；不过够怪的是，用铅锡合金茶壶(如今很少见了)泡出来的茶倒不赖。
Silver or Britanniaware teapots produce inferior tea and enamel POTS are worse; though curiously enough a pewter teapot (a rarity nowadays) is not so bad.
大不列颠从1300年开始便采用金银纯度印记；金或银要通过纯度试验和打上国王标记后才得以出售。
Hallmarking in Britain dates from 1300; no gold or silver could be sold until tested for purity and struck with the king's mark.
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