Originally posted by Herlock Sholmes
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If I understand RJ Palmer's position, he takes the view [originally supplied by Voller, before he saw the diary for himself] that Leeds may only have assumed that their methods and equipment could detect the presence of chloroacetamide, and their first test on ink taken directly from the diary gave what appeared to be a positive result. The second test was conducted to eliminate the possibility of contamination and confirm if the ink did or did not contain chloroacetamide. The result was negative - which can indicate one of two things: the ink is not Diamine; or whatever Leeds thought had contaminated the sample used for the first test was not chloroacetamide, but some other unknown substance that was not found when the test was repeated. That's the only explanation I have seen for Leeds getting the results they did if they were testing Diamine ink - twice.
For whatever reason, AFI's testing methods were not repeated, which is a great shame because their own positive result could not be repeated, to eliminate the possibility of a false positive in their own case. False positives are an occupational hazard and can be hard to rule out without subsequent testing, and I've always been led to believe that it's not good science if a test is not repeated or repeatable, to confirm a positive result.
Edited to add...
If Mike was lying when he identified the Bluecoat art shop to Harold Brough as the source of the diary ink, then it's not Diamine and Mike knew it - simple as that.
It could be argued - and I'm sure it will be, if the diary ink is ever tested again and Diamine isn't indicated - that Mike got the ink from somewhere else and got a kick out of watching everyone running round like headless chickens, unable to nail him for forgery or to disprove his claims.
The difficulty would be trying to identify some other 'modern' ink that could have been used instead - with or without Mike's added sugar. I don't think another type of ink has yet been realistically suggested.
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