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On 12 Jan 2012 at 15:23, Dennis King wrote:

> > The bad news first: using UV light did not help at all. The blotted
> > portion of the page stayed just as blotted under the UV lamp.
> 
> Rats.  But plain UV is still pretty low-tech, isn't it?

It is, indeed. But I thought it wise to use a cheap and easily 
available technique first, to see if it yields any results, before I 
bring in the heavy artillery, which - apart from requiring a bit of a 
logistic effort - is also quite expensive.

David