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Another tech told me to leave an action in sunlight for a while to kill mildew in an action.

What about just taking the action to a tanning salon? Wouldn’t the high intensity UV light do a faster/better job than leaving it out in sun?

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It might do, but it may turn the wood brown too; they use UV-A tubes which are apparently quite a lot more intense than sunshine. I had a colleague who tried to bleach Ivory using UV-A tubes rather than UV-B; I can't remember if it had any effect on the Ivory, but do remember him saying the tops of the keys (wooden part) picked up quite a tan...!

Last edited by Adypiano; 05/03/22 05:09 AM.

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Interesting question. Slightly related, leaving genuine ivories in sunlight bleaches them, I've always wanted to try a set on a sunbed to see what would happen. I don't know anyone with one sadly.
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Mildew is a subset of molds and fungi. You can have it tested so you know what it is and how best to handle it. I use this mold testing lab. You press a piece of scotch tape onto the mold then stick the tape on a piece of paper and mail it to them. They look at it under a microscope and email you a list of the mold types and a description of their their health effects. Here's a sample report.

Last edited by MarkL; 05/03/22 01:25 PM.

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Originally Posted by N W
Interesting question. Slightly related, leaving genuine ivories in sunlight bleaches them, I've always wanted to try a set on a sunbed to see what would happen. I don't know anyone with one sadly.
Nick

I tried to bleach the keys in the sunlight with 12% hydrogen peroxide. For comparison there's one key to show how yellow they were.

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