Doctor blade's flaws or plate flaws???

[Rein]

José,

which printings do you refer to????

The first were in screenless photogravure!!! Later on there were printings in reel-fed recess!!

saludos, Rein

[Otin]

José Leal:
Por las características de las rayas parece que efectivamente son rayas del cilindro. El hecho que en el segundo sello las muestre más débiles es normal, a través de toda la tirada el cilindro se va desgastando debido a la abrasión, mucho mayor en los sellos fotograbados, que lo son sobre una plancha de cobre, por lo menos aquí en Argentina. Por los scans que enviaste parece que en Méjico le dan un revestimiento de cromo, lo que disminuye los afectos de la abrasión.
José merlo

[Rein]

Unscreened photogravure with doctor blade lines!?

to be continued ....

[Otin]

Rein,
Why not?.
José

[Rein]

Rein,
Why not?.
José

José,

as some still refer to these stamps as to printing in recess! Which it is NOT!

saludos, Rein

[Otin]

Rein,
Photogravure is a recess printing, of course not tailla douce. That Mexican stamps - I don´t have it- seems to be photogravure not steel engraved . Please comment.
José

[Rein]

Rein,
Photogravure is a recess printing, of course not tailla douce. That Mexican stamps - I don´t have it- seems to be photogravure not steel engraved . Please comment.
José

José,

read my thread:

viewtopic.php?f=137&t=4816

saludos, Rein

[filatemusico]

Rein.

Sreenless???
I'm not sure

[filatemusico]

this is not a normal screen but there's a regular pattern...

[filatemusico]

Mexico had photogravure workshops since 1992 (book "Imagenes del Deseo" by Julieta Ortiz Gaitán page 54)

http://books.google.com.mx/books?id=NRa ... 22&f=false

[filatemusico]

Rein.
When I read you tread I tried to search information about it but I have not found anything abuot printing of that periot of time I consulted with people who know to much about the stamps of that period but did not know what happend, your topic is the unique reference.

Where is the confusion? THERE IS A ENGRAVED MASTER DIE OF THOSE STAMPS.
in México were used several printing machines: WHITE & SEVILLE LTD, OTLEY, (American) VOIRING (French) We can recognize these impressions by perforations 12, line perforation and 10.5, harrow perforation
These printing machines were hand fed. (Celis Cano)
Goebel 1 1936 14 harrow perforation, Goebel 2 1953 harrow perforation, Goebel 3 1969 14 comb perforation.
WIFAG (Winkler, Falbert & Co. A. G.Bern Switzerland) 11 and 11.5 comb perforation, this machin could print both Engraved and photogravure.
Goebel and WIFAG web-fed.

[Rein]

José,

there always have to be longish dots or short lines to keep the ink but there was no regular screen! The only irregular screen used for photogravure was the mosaic screen used for 1923 Egypt and that is awfully similar to the stochastic screen we have now for offset-litho!

saludos, Rein

[Rein]

Rein.
When I read you tread I tried to search information about it but I have not found anything abuot printing of that periot of time I consulted with people who know to much about the stamps of that period but did not know what happend, your topic is the unique reference.

Where is the confusion? THERE IS A ENGRAVED MASTER DIE OF THOSE STAMPS.
in México were used several printing machines: WHITE & SEVILLE LTD, OTLEY, (American) VOIRING (French) We can recognize these impressions by perforations 12, line perforation and 10.5, harrow perforation
These printing machines were hand fed. (Celis Cano)
Goebel 1 1936 14 harrow perforation, Goebel 2 1953 harrow perforation, Goebel 3 1969 14 comb perforation.
WIFAG (Winkler, Falbert & Co. A. G.Bern Switzerland) 11 and 11.5 comb perforation, this machin could print both Engraved and photogravure.
Goebel and WIFAG web-fed.

José,

I realise that! There was must be a photographic original! Or even a multipositive film later on, but it is a pity the collectors of the earlier periods did not publish the information they had.....

The more recent Goebel and WIFAG are well-known presses! I was lucky to see them recently - December 8th, 2012, in Mechelen, Belgium - whee they are still used for printing stamps...


to be continued ....

[filatemusico]

http://www.flickr.com/photos/glennmorganuk/page42/
Can you open other topic? there are many of interesting images of machines (old a new) and explain how they work
please.

[Rein]

Another fake doctor blade! Look at the details - especially at the right!








to be continued ...