What is KDM and non KDM gold?

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Tags

1. #without
2. #metals
3. #replaced
4. #solders
5. #still
6. #after
7. #other
8. #ornament
9. #soldered
10. #alloy
11. #advanced
12. #commonly
13. #means
14. #purity
15. #affecting
16. #cadmium