ameis33
Member 
What's in a name? That which we call a rose, by any other name would smell as sweet
Posts: 505
What I collect: Poland and Italy Republic
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Post by ameis33 on May 10, 2021 21:08:52 GMT
Can we speak of a double printing? No, because printing is not the right word... incision? Anyway, can we speak of a double...?   |
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chrischross
Member
Posts: 206
What I collect: France, French Africa, FSAT, French Polynesia
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Post by chrischross on May 11, 2021 1:19:38 GMT
If I'm interpreting the engraving design correctly, there are two blue colors here, a lighter blue (the background pattern behind the "POCTZA" text) and a darker blue (the "POCTZA" text). So that led me to look up the two-color intaglio printing process, and sure enough, this is the process as I remember it in my father's press shop (although PPE? lol, it was the 70s): digitalobby.spu.edu/art2421printmaking/intaglio-printmaking-art-2421/So my best guess? A plate "registration" error on the second blue in that particular area of the plate? Because everything else looks mostly in register? This video towards the end does a decent explanation of registration errors:
Update: This guy is highly entertaining (and enlightening): |
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ameis33
Member
What's in a name? That which we call a rose, by any other name would smell as sweet
Posts: 505
What I collect: Poland and Italy Republic
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Post by ameis33 on May 11, 2021 20:22:48 GMT
Thank you for your help Chris. The stamp indeed has not been printed in two times. The different shade of blue depend on how the die has been made. But the stamp has been printed with a single cylinder in one pass. So, it cannot be a register misalignment.
I spoke about a "double printing", but that's not the right term... It is not a printing error, but an error preparing the printing cylinders during the transfer of the stamp image on the cylinder. Mostly an incision error... In polish there is a specific term: "podwojny moletowanie", double "moletowanie", but i don't have a good translation for the last term... incision? engraving?
The stamp has been issued in 1954, in a set of 6. The 1,55zl value has been the most used stamp in the set, printed in around 61 milion exemplars. The printing cylinders were composed by two sectors in sheets of 10x10. 12 cylinders in total have been used for the entire production.
It can be considered as a plate fault, even if is not present in all the sheets. It is catalogated and listed in several positions and in several shapes.
Not a huge catalog value as used, but a couple of hour of work sorting my stamps.
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Post by TSF Admin on May 11, 2021 21:29:45 GMT
...I spoke about a "double printing", but that's not the right term... It is not a printing error, but an error preparing the printing cylinders during the transfer of the stamp image on the cylinder. Mostly an incision error... In polish there is a specific term: "podwojny moletowanie", double "moletowanie", but i don't have a good translation for the last term... incision? engraving?... The English term for what is being described is likely "double transfer." |
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ameis33
Member
What's in a name? That which we call a rose, by any other name would smell as sweet
Posts: 505
What I collect: Poland and Italy Republic
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Post by ameis33 on May 11, 2021 21:34:54 GMT
Those are exactly the words i was looking for... Thank's
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vikingeck
Member
Posts: 3,261
What I collect: Samoa, Tobacco theme, Mail in Wartime, anything odd and unusual!
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Post by vikingeck on May 12, 2021 8:40:40 GMT
If due to a careless “rocking “ it is strange that there is no doubling other than the word WARSZAWA... no doubled lines, no doubling of CZ Slaina etc nor the value 155
It looks like the original WARSZAWA a has been too high , and has been partially removed and re- engraved. Does that make it a re-entry?
Have you any other copies of this stamp .
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ameis33
Member
What's in a name? That which we call a rose, by any other name would smell as sweet
Posts: 505
What I collect: Poland and Italy Republic
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Post by ameis33 on May 12, 2021 19:04:10 GMT
I don't know exactly how the image of the stamp is transfered on the printing plate. But the desciption given by Steve says: Sometimes a double transfer on a plate is discovered and is "burnished" out. But if this process is not totally successful, some amount of doubling of the design may remain.
I believe this is the answer to your question, but i'm not such inside the printing techniques to explain you more. I have seen a similar fault, and just related to a specific pattern of the stamp, on other polish stamps...
I have around 100-200 of those stamps, unfortunately that's the only one i've found with such an error...
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ameis33
Member
What's in a name? That which we call a rose, by any other name would smell as sweet
Posts: 505
What I collect: Poland and Italy Republic
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Post by ameis33 on May 15, 2021 20:25:31 GMT
My understanding of these kind of error is this. From the original project of the stamp, few dies were produced. These dies were then used to prepare the printing plate (or a cylinder, but i'm not sure if in 1954 rotary machines were yet in use). For ordinary stamps, or stamps printed in huge quantity, the printing plate needed periodically maintenance or to be replaced. During the maintenance, if some position in the printing plate were damaged and needed to be adjusted, the old image was first erased and a new image was printed using the original die. If some portion of the previous image were not completely or accurately erased, when the new image was created, the new and the rest of the previous image overlapped creating these fault. Here you can see the same kind of error on a different stamp. Fisher 736 B4. I can see double transfer on the L of Olsztyn and in the P od POWROTU  Fisher 736 B1. L of Olsztyn  Fisher 736 B1. L of Olsztyn, but very light  |
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vikingeck
Member
Posts: 3,261
What I collect: Samoa, Tobacco theme, Mail in Wartime, anything odd and unusual!
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Post by vikingeck on May 16, 2021 8:32:59 GMT
That is what I understand as a “ re-entry”.
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Mr. H
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Member - APS #129381
Posts: 935
What I collect: US, Netherlands, Whatever suits my fancy.
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Post by Mr. H on Sept 12, 2022 13:02:42 GMT
I came across this one last night working on my Polish Collection. Are they fairly common?  |
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ameis33
Member
What's in a name? That which we call a rose, by any other name would smell as sweet
Posts: 505
What I collect: Poland and Italy Republic
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Post by ameis33 on Sept 12, 2022 19:07:16 GMT
Hello Mr. H
Figure out, how much of those stamps were printed? How much of them were used?
It is not difficult to put aside a heap of them to dig into, and so these variety on used stamps are not difficult to find and the catalog values consequently are not so high. It's a catch to get it on a MNH one...
Now i'm not at home (i will answer properly when i'll be back this weekend), but if a normal used stamp worths 0.20 zl (5c), such a variety 5 zl (1 US$).
I've found mine three above on 100 (? Something like) stamps...
About the double Warszawa, i've found one on 100 (? Still, something like)...
Another difference that you can easily find in polish stamps of this period is the perforation. Poczta Polska had two printing machines, each equipped with different perforation gauges/blocks. So, when (like in this case) stamps were printed in milions in different printings, it's pretty common to find two or more different perforations. Have you ever measured it?
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