...AN INVERTED VIEW OF THE
REVEALED CODE PAGE...

This step was to invert the coloration of the double negative image purely to see what would it look like. As you can see it bears a resemblance to the 'code page' that we have all been used to seeing with the addition of the now pale-coloured parallel lines.

It certainly shows some more detail and the 'stain' at the top right is quite promising as far as microcode recovery is concerned. I must apologise for the top left corner, it reacted more quickly to the citric acid treatment than I expected.

In white, you can just make out the vertical parallel lines, there are 6 pairs of them in total. The exact nature of these lines is still a little uncertain but it is possible that they were left by a 'drying frame'. Such frames were used to dry handmade papers and still are in fact. In those years commercial printers as was the case of Whitcomb and Tombs said to be the printers/publishers of the copy of the Rubaiyat of Omar Khayyam found and associated with the Somerton Man. Whilst there is no evidence, in the WW2 years, and I would imagine later, printing work was subcontracted out at times. To the point, if this was a special purpose book, one printed specifically for use as a code book or one-time pad, it would make sense to have the special papers needed to be made in short runs and not bulk processing/manufacture. Will chase that down and publish when I have more information.

The post is short, I just wanted the audience to know that this is a work in progress and I am still examining these incredible images.