Vapona thin papers vs moth balls

[jonathan]

Hi people,
Since the EU has banned Naphthalene moth balls, I had to find an alternative insect repellent for my collection, so I started using vapona thin sheets.

My questions are:
1. Are the vapona sheets as effective as moth balls?
2. How do you know when to replace the sheets as they don't smell?
3. I put a piece of circa 1cm x 1cm in each drawer. Is that enough?
4. Is there something better than vapona sheets and which is not that expensive?

Thanks
Regards
Jonathan

[colin12303]

I think you should read the article 2 below yours
'museum beetle outbreak'