Do oil paintings darken over time?

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Tags

1. #gradual
2. #darken
3. #begins
4. #colors
5. #decades
6. #eventually
7. #artist
8. #transparent
9. #taking
10. #moment
11. #color
12. #painting
13. #shift
14. #become
15. #centuries
16. #change
17. #completes