If the soldering was not done sufficiently tightly, leaving tiny cracks or gaps, the acidic solution will seep into the crevices, and in the future will slowly penetrate into and damage the luster of the instrument. This is why the soldering process, which looks so simple at first, in fact is very demanding, because it has to be flawless.
倘若之前的焊接不夠完全密合、含有微小縫細，酸性藥劑就會鑽進縫細，在日後慢慢釋放出來傷害樂器表面光澤，因此看似簡單的焊接功夫，一點也馬虎不得。