[brianhejh]

I have an ovation guitar from the seventies, I recently took it out of the cupboard to get it back into playable condition.

It has always had a rather long crack on the top, about (8) inches.

Over the last couple of days I have been playing around with the humidity
levels within the case/guitar included.

This morning I opened the case and the H/L was 40% which I thought was really good because the RH in my area lately has been 65/70% however I immediately noticed that the crack had opened up much more than I had witnessed before.

I thought the low humidity would help to shrink/close the crack not open it?

When is the best time to repair the crack ( when the crack is (like now naturally open) (then force close with clamps and glue) Or try to get it to return to minimum crack width IE - re adjust the humidity level.

Thanks

Brian