Scott #586B - Mysterious Black Ink.

Hi guys..Take a look at this Scott #586b booklet...Look at all the arrows and the circled area...There is evidence of black ink..Apparently this booklet has no black engravings or letters.

A couple of spots you missed ...

Come on wt1...Your killing me...I didn't have enough arrows to go around...

You can even take that same image to the next level and blow up the words "postes/postage" where you can clearly see the slash mark ( / ) is positioned differently!

Ya..I see that wt1...hmmmm

My wild off-the-wall guess is that the plate used to print these stamps was used to print color trials, and that they didn't properly clean the plate before starting production in the chosen color. Like I said . . wild and off-the-wall but it's the only thing that makes sense to me right now.

The red and/or orange on these stamps has mixed in with the blue. Extremely common for this issue.

I cannot see any difference in the slashes

Like BC mentioned this is very common for these
booklets printed by the British American Bank Note Co.

They were printed on a 3 colour Goebel intaglio press
(also capable of up to 4 photogravure colours)
which used the Giori process whereby only one cylinder
plate was used with 3 ink fountains.

Therefore in a single pass 3 colours could be applied
but this obliviously caused bleeding together of the
colours, more or less depending how properly
the wiping paper cleaned the print cylinder.

BeeSee, the bottoms of the two slashes are not the same distance from the two words 'postes'! I really believe the two slashes are printed under a different angle. Now, this is THE ultimate flyspecking!

Peter

Lithograving, thank you for the explanation. Could you go just a bit further and tell us if this is normal for this type of printing, or if this is poor print quality? I collect US Transportation Coils and the later denominations were printed in two colors. The design was in one color, and the service inscription was in red. It is very hard, if not almost impossible to find stamps that do not have this "bleed".

Peter

BTW wert, you're six Queens short of a booklet.

Peter I'm no expert on printing but have always had an interest
in it.

I don't know what press was used for the transportation
coils but the BEP began in 1957 printing multicolour stamps
using a Giori press.
Now that so called Giori press used the giori process but
those presses were manufactured Koenig & Bauer AG (KBA).
but Goebel also used the same process.

I don't have a list yet of how many printers used this
Giori process but a short list would be BEP,BNAB BABN, State printers of Sweden, Spain, Italy, Denmark....

From what I have seen the degree of "bleeding" depends on how well
the inked areas are separated and the expertise of the
print team.

The Canadian ones are basically simple as is since even though
3 colours were used to print one sheet, each stamp was only
one colour therefore separation was easy.
Compare the US Giori from the sixties where you have the 3 colours
on one stamp and it sometimes got messy.


Take a look at this one here Spain Scott 1699



or this one which isnt that bad.



I my opinion the best results in colour separation was done
by the Swedish and Danish Printing Works.

Lithograving, again thank you! The press used for some of the Transportation Coils was a Giori system intaglio press, built by Koenig and Bauer of Wurzburg, West Germany.

Peter

Well..Let me tell you that when a printer removes a cylinder plate to ready for another plate..The new plate size if almost and identical size as the one removed..A pressman would wash down the cylinder,,If and I do mean IF he did not clean it properly the bleeding or extra colour would be prevalent on the outer areas of the sheets that are now being printed..This does not explain why stamps in the middle of the sheets have colours that can not be explained.

Yes lithograving my friend, you are correct...6 less stamps,but was not trying to say this was a complete booklet, rather I was trying to centralize on the fact that there were colours that should not be there...

Yes Peter thanks, I just corrected it.

Koenig and Bauer indeed built the BEP presses.

Goebel, Darmstadt, Germany built the multicolour intaglio presses
for BABN, Sweden,Denmark and I believe Switzerland which
uses basically the same process as the K&B.

I cannot see that. There is too much "pixelization" in the scan which may give a false look. I checked many of the dozens of books I have under a 10X glass and cannot see any difference.