Brazil 1866 Dom Pedro Bluish Paper?

There's supposed to be two kinds of this stamp, white woven paper and one on bluish paper. None of the examples with bluish paper I have seen looked bluish to me so which one is mine?

I understand that it is the imperforate version of this stamp that was printed on two different papers.

No the whole serie comes perforated on bluish paper.

Only the 10r and 20r also exist imperforated but both on white and bluish paper.


Mine is perf 12 so I don't think it's the rouletted 76-77 version though it doesn't say perf 12 would be excluded from those so it's possible.

Is anyone in possession of the bluish version or perhaps has a clear picture to clarify?

I read this blog that states the following:

might be a good idea to scan the back then

Perry, I looked closer and, yes, the perforated stamp comes in both types of paper. I could find no good example of the perf. version but did find this. Pretty curious.

I think it should look something like this:






Not sure what to think about this one, combination of discolloration by ink perhaps:




I'm getting the idea it's the gum that's supposed to be blue and mine has no gum left so it's not possible to tell.

Perry, I'll ask a friend in Brazil about this stamp. I think he will know someone from his club who collects these.

Perry,

It could be my ignorance of Portuguese but I can't find any reference to "papel azulado" in the Brazilian catalog, RHM, for this series. I know they are listed in Scott.

I did find an article on the Brazil Philatelic Association website that discusses Brazil-Empire stamps. http://www.brazilphilatelic.org/attractives.pdf Blued gum is discussed on page 7. I am no expert on these stamps so I can't vouch for the accuracy of the description. It does, however, show some examples of "blued gum" stamps.

Maybe this will help.

Dan

I found the answer, I think.

http://webcache.googleusercontent.c...t=clnk&gl=us

1868 – PAPEL AZULADO (GOMA AZUL)

Para evitar um novo aproveitamento dos selos mediante a lavagem dos carimbos, foi excogitado um sistema de usar papel com substância que, em contato com a umidade deveria provocar intensa coloração azul ao papel.

A reação provocada pelas condições atmosféricas do país tornou ineficaz a iniciativa, porquanto o papel dos selos tornava-se azul, mesmo sem o contato com a água.

Suspender-se, assim, o fabrico de tais selos, os chamados "azulados" ou, erroneamente, "azulados pela goma". O 50 réis apresenta-se geralmente com o verso inteiramente azulado idêntico ao selo fiscal SF-25, nos demais valores e raramente no 50 reis, as manchas só atingem as margens (100 réis) e as partes não correspondentes à impressão.

Essentially, the government was experimenting with a substance that would turn the stamp blue once it was exposed to moisture. The problem, of course, is that Brazil is a humid country (for the most part) and the stamps turned even without being postally used. This brought the experiment to a close.

EDIT: I should point out that the above claims that it is wrong to say 'blued by the gum,' which leads me to believe that the reagent was placed in the stamp's paper and not in the gum.

I found an interesting stamp with the blue color just in the center. Someone has an idea how this could happens or It is just a fraud? I read a text about other techniques to avoid frauds tested by American Bank Note in 1866, but I do not found information about these techniques .

Searching through the forum and I came across this thread. The OP is from 7 + years ago and I was wondering if in that time anyone had acquired or come across any resource which shows the 10 dez reis on bluish paper?

I would like to compare a stamp I have come across (shown below) with a known example if possible.

Banana - Bluish paper isn't actually blue. Your stamp looks as if it picked up some fugitive ink during soaking.

Thanks rogdcam - I appreciate the explanation, makes sense.