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Czechoslovak Stamps Printed On Diestamp Print Presses

 
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Pillar Of The Community
Czech Republic
562 Posts
Posted 06/28/2018   07:41 am  Show Profile Bookmark this reply Add florian to your friends list  Get a Link to this Reply
Here is an attempt at a translation of the description of the 2017 J. Pešicová colour separations (see http://expo-net.blogspot.com/2017/1...roslava.html ):

UMĚLECKÁ DÍLA NA ZNÁMKÁCH: JAROSLAVA PEŠICOVÁ
WORKS OF ART ON POSTAGE STAMPS: JAROSLAVA PEŠICOVÁ
Otisky a soutisk rytin známky
Progressives of the postage stamp and their colour registration
Datum vydání: 13.12.2017
Date of issue: Dec. 13, 2017
Rytina známky: Václav Fajt
Engraver: Václav Fajt
Způsob tisku: ocelotisk z plochých desek v barvách černé, žluté, červené, zelené a modré
Printing method: die stamping from flat plates in yellow, red, green, blue, and black
Náklad: 1 500 ks barevné separace známky
Print run: 1,500 pcs of each of the colour separations of the postage stamp


Vícebarevný ocelotisk z plochých desek je velice obtížná technika tisku poštovních známek.

Multicolour die stamping from flat plates is a most demanding techique for printing postage stamps.
Ve světě je tato technologie vzácná a v Evropě tímto způsobem tiskne známky pouze Poštovní tiskárna cenin Praha.
In the world, this technology is rare, and in Europe, it is only Poštovní tiskárna cenin, Praha that prints postage stamps in this way.

Složitost procesu spočívá v nárocích na přesnost provedení a znalosti rytce, který musí z barevné předlohy nejprve určit, co bude tištěno jakou barvou a tyto barvy také zvolit.
The complexity of the process lies in demands for the accuracy of the facture and the knowledge of the engraver, who must first determine what will be printed with what colour as well as what colours to choose.
Některé výsledné barvy totiž vznikají až překrýváním barev při tisku.
The thing is that some of the resulting colours are the consequence of the overlapping of inks.
Obvykle se používají čtyři barvy, v některých případech až 6 barev a jednotlivé rytiny musejí v soutisku vytvořit výsledný obraz.
Typically, four colours are used, in some cases up to 6 colours, and the individual engravings must produce the final image in their colour register.

Každá takto vzniklá známka je uměleckým dílem, což potvrzuje I vyobrazená známka.
Each such stamp produced in this way is a work of art, as evidenced by the stamp shown.
Na této známce je využito motivu z díla Jaroslavy Pešicové "Vítěz".
This stamp uses the motif from Jaroslava Pešicová's work entitled "The Victor".
Jaroslava Pešicová (30.12.1935 - 30.8.2015) byla českou malířkou, grafičkou a ilustratorkou.
Jaroslav Pešicová (b. Dec. 30, 1935 - d. Aug. 30, 2015) was a Czech painter, graphic artist and illustrator.
Velké části autorčiny tvorby dominuje figura, jež je zasazena do výpravné a barevně bohaté kompozice.
A large part of the author's work is dominated by a figure which is embedded in a narrative and colour-rich composition.
Ta na známce krásně vyniká právě díky zvolené metodě vícebarevného ocelotisku.
That on the stamp stands out beautifully due to the well-chosen method of multicolor die stamping.


N.B.
All of the colour separations of this issue were inserted in plastic mounts before being affixed to their backing sheet held in a blue folder with the Czech Post logo on it.
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Edited by florian - 06/28/2018 08:02 am
Pillar Of The Community
Netherlands
664 Posts
Posted 06/28/2018   1:57 pm  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
Florian,

if the order of the colours is important?!


Quote:

Způsob tisku: ocelotisk z plochých desek v barvách černé, žluté, červené, zelené a modré
Printing method: die stamping from flat plates in yellow, red, green, blue, and black


Why black as the last colour??

pozdrawiam, Rein

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Pillar Of The Community
Czech Republic
562 Posts
Posted 06/29/2018   09:35 am  Show Profile Bookmark this reply Add florian to your friends list  Get a Link to this Reply
Galeoptyx - Rein, "Why black as the last colour?" This is the way multicolour engravings are printed.

I am sorry to say that in paragraph 2, one sentence was dropped by mistake.

Paragraph 2 reads in full as follows:

Složitost procesu spočívá v nárocích na přesnost provedení a znalosti rytce, který musí z barevné předlohy nejprve určit, co bude tištěno jakou barvou a tyto barvy také zvolit.
The complexity of the process lies in demands for the accuracy of the facture and the knowledge of the engraver, who must first determine what will be printed with what colour as well as what colours to choose.
Některé výsledné barvy totiž vznikají až překrýváním barev při tisku.
The thing is that some of the resulting colours are the consequence of the overlapping of inks.
Pro každou z barev je nutné, aby rytec vyryl soustavu čar a bodů do separátní ocelové destičky.
For each of the colours, it is necessary for the engraver to engrave a system of lines and points into a separate steel plate.
Obvykle se používají čtyři barvy, v některých případech až 6 barev a jednotlivé rytiny musejí v soutisku vytvořit výsledný obraz.
Typically, four colours are used, in some cases up to 6 colours, and the individual engravings must produce the final image in their colour register.

Groetjes,

Florián
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Edited by florian - 06/29/2018 09:43 am
Valued Member
United Kingdom
283 Posts
Posted 06/29/2018   12:48 pm  Show Profile Bookmark this reply Add 65170 to your friends list  Get a Link to this Reply
In any of the main printing processes it is normal, but for various reasons not always the case, to print light colours (first) to dark colours (last) when undertaking multi-coloured printing. The Czech progressives under discussion follow this "rule" (i.e. yellow, red, green, blue, and black).

Yellow is especially notorious for becoming "dirty" if applied mid-print or last. That is to say, it can be affected by the other ink colours that have gone before it. Black is usually applied last to act as the "key" that brings every ink that has gone before it together.

In offset four colour process printing, despite it being called CMYK, the inks will usually be printed YCMK or YMCK, for the reasons outlined above. I hope that this helps, Rein.

GLENN
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Edited by 65170 - 06/29/2018 1:02 pm
Pillar Of The Community
Netherlands
664 Posts
Posted 06/30/2018   1:03 pm  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
Florian & Glenn,


Quote:
Způsob tisku: ocelotisk z plochých desek v barvách černé, žluté, červené, zelené a modré


Printing method: recess from flat plates in the colours: black, yellow, red, green and blue .... ;)

pozdrawiam, Rein

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Pillar Of The Community
Netherlands
664 Posts
Posted 11/27/2018   04:46 am  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
I may have missed it here, but I just found a reference while searching for Waite&Saville:

https://www.ptcpraha.cz/wp-content/...istory-1.pdf

Rein
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Pillar Of The Community
Czech Republic
562 Posts
Posted 11/28/2018   07:18 am  Show Profile Bookmark this reply Add florian to your friends list  Get a Link to this Reply
After putting its last WIFAG rotary press 3 out of operation due to low print runs of rotary printings required, the stamp printer PTC Praha continues to operate its Waite & Saville and Fr. Heim & Co. Offenbach die-stamping presses.

The latter press, produced in 1976, has been successfully repaired (see https://www.facebook.com/photo.php?...pe=3&theater and click on +5 in the last image) and put into operation again to produce a large-format (124 by 203 mm) s/s for Slovakia in 2017 (see https://www.pofis.sk/en/catalog/pro...es-in-levoca and the detail of the stamp http://www.wnsstamps.post/stamps/20...SK020.17.jpg ). Print process: offset and die stamping from a flat plate in black.

The stamp (Sc. #1875) issued by Czechoslovakia in 1968 showing a detail of the same sculpture: http://www.cpslib.org/pages-large/1968-1733.htm . The stamp was printed in four colours on a Waite & Saville die-stamp press. Its engraver Jindra Schmidt had incised 4 separate dies, one for each colour, printed in sequence, yellow, red, cyan, and black.
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Edited by florian - 11/29/2018 03:12 am
Pillar Of The Community
Netherlands
664 Posts
Posted 11/29/2018   03:12 am  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
Great pictures by Miroslav!!
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Pillar Of The Community
Czech Republic
562 Posts
Posted 11/29/2018   03:21 am  Show Profile Bookmark this reply Add florian to your friends list  Get a Link to this Reply
Thanks, Rein.
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