Rodney wrote:
Recently read in a Stamp Magazine:

"MG also wanted to know how I use French chalk to keep my
mint stamps from damp, I just give them a light dusting as though
I was adding salt to a hard boiled egg. Too much could
possibly effect the surface in some way I don't know about,
so I only sprinkle lightly"

Rodney:

Are you recommending the use of French chalk?
What date was the article?

Blair