The added lead strengthened the tin and made it easier to shape, but before long it oxidized and turned black. This gave the impression that tin objects tarnish easily. But in reality, pure tin does not tarnish.
而加入鉛也可以增加錫片的硬度，使其容易成型，但時間一久，過多的鉛因氧化而變黑，因此給人錫製品容易變黑的印象，事實上，純錫並不會變黑。