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<p>[QUOTE=&quot;Ce BCA, post: 4488565, member: 18716&quot;]Nice.&nbsp; I&#039;ve never seen solid 9ct have verdigris and it is of course a very common grade in the in the UK.&nbsp; But basic gold solder (approx 25% gold, 45% silver, 20% copper and about 10% brass) certainly does suffer from it, the copper content can come to the surface during the process then it can go green over time.&nbsp; So not necessarily a problem especially if it is at joins and solder points.&nbsp; Surprised the vendor didn&#039;t clean it up though if they tested and knew it to be gold.&nbsp; May be best to have checked to be sure.</p><p><br /></p><p>Edit to add, on gold it can be a good indication of age as modern solder compositions don&#039;t seem to suffer from this is the same way.[/QUOTE]</p><p><br /></p>

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