I'm still in the process of getting a copy of the article so the answer to my question may already be printed, but were the dags displayed in their orgiinal cases?

I have a collection of Dags, most in their original cases and even those with the seals unbroken there has been increased deterioration. All in dark, cool storage for about 30 years with viewing on rare occasion. Most of what I see appears to be the routine tarnish growth from edges to center... not "white haze", which I've never heard of before this.