Foro de Filatelia Argentina

Traditional photogravure have the same size dots, if a line for example is little bigger than a dot a part of other dot is added and if it is smaller, it only use a part of a dot but there are some stamps from Mexico that seem to have dots with variation in size. Please see the air coated papers 5 a...

About this souvenir sheet, catalogue Scott (896a) say that this is photogravure, which is not, because this do not have variation in tone, it is offset and it have the normal screen for offset.

José, moletting with two different dies???? The TIEV is very progressive and advanced ..... saludos, Rein P.S. any explanation for the "closed screen" photogravure? Rein, I have a theory but I 'm not sure. When dots with size variation are used in photogravure, the dots as soon they are g...

Rein I found this damaged pair of stamps...

And at least 2 different wire structures

Zooming

In the 8th paper exist some stamps printed on the wire side. https://qzczkq.by3301.livefilestore.com/y2p_pJ6AYkSx2__gY-CsS67KjEyAU9HeaKeU_aytPVxP6LkVWSmQmQteWzCu8-TmvInM9n7cnn8iWXe4kAyMPEw1Sqpxo2A3NZeBbfsCNgtEFg/wire%20side.jpg?psid=1 https://qzczkq.by3301.livefilestore.com/y2ppDf_-3UjGBNM_U3E21WIAF...

Rein escribió:So the 70c Constituyentes has paper #1B!

But does paper #1A also exist for the 70c??

I do not know, I have very few stamps from that time.

It seems residues lignin, maybe chipswood paper is the same. http://www.knowpulp.com/english/demo/english/pulping/bleaching/1_general/ko2q1p1q2p3_2.htm Do you notice some difference? In some cases the material is not uniformly distributed: https://qzczkq.by3301.livefilestore.com/y2pRHwC70hTXqeXLa6ZI...

That is the reason why we can not trust the TIEV, we need all information to reach a conclusion.

On the other hand, TIEV used to translated paper from other orders, then it is common to find out old paper in new stamps.
Here a example:

There is a version of #1B that has a lot of yellow in the gum [?]: http://www.galeoptix.nl/fila/mexico/thumbs/mex_1975_exporta_4p_miel_1B_14.jpg The gum breaking is still descending! And gum arabic NOT synthetic as paper #2 and paper #4! In this case is the gum yellowish? In the Miel $4 stamp, pape...

Miel $4 is Samuel Jones paper. https://qzczkq.by3301.livefilestore.com/y2pjlO-kunZPDuGfYnqwi-tx1j4zkz5OQ5jNRSUzLRsmdaaFVzU--zE_OGBwuj75DElZjmSiP1ZXHXgKDKPpk0OHetcamwo7LrBIL3c97kNasU/miel%20008.jpg?psid=1 The lower stamp is what I call "aserrín" paper https://qzczkq.by3301.livefilestore.com...

This is the most common gum of American paper

Only in paper 1 the figures don't add up