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Posts Made By: Ray Jacoby

December 15, 2005 11:24 PM Forum: Equipment Talk

what to do about mold?

Posted By Ray Jacoby

There is actually a fungus which grows on optical surfaces. In large amounts it sometimes has the appearance of "spider-webbing". If it remains long enough, it can eat the coatings and eventually even etch the glass itself.

Flooding your optical-train surfaces periodically with the light of the nearest star will prohibit/inhibit it's formation, as it requires a specific "window" of darkness, temperature and moisture to grow.

It is quite easily killed and removed with a solution of 50% regular ammonia (non-sudsy) and 50% hydrogen peroxide. It is best to also clean the adjacent mounting surfaces where the fungus can linger. If caught soon enough, this will save the surface/s; unfortunately, any damage and/or etching that may have already taken place will remain.

Clean optical surfaces normally after use.

Hope this helps.