Spain 1955 Francisco Franco Different Papers?

Ok I was going through some of my lower value stamps putting them together for my album and came across some 25cent Franco stamps. I noticed that for the 25cts stamps that I have there seems to be 2 different papers one is a matte paper the other is a glossy. Are the stamps in this series known to have different paper formats?

Could you be more precise in your question please?
There are 3 differing 25c Franco stamps.

The 1955 series is on the mat(PAPEL MATE) paper with a sort of gum arabic.
In the 1962 printings there is the glossy paper(PAPEL BRILLANTE).

For the stamps that I have the difference seems to be in the type of paper used. The more mat finish of the one is thinner and less glossy. The other is noticeably thicker with more of a smoother light reflective surface than the other. And looks like it has a higher clay content in the finish of the paper. The printing on them is virtually the same. My catalog only shows the issue dates not the printing dates for the series. So I was unsure that they would shift papers in the middle of a printing. So if it was a completely different printing that would explain the paper difference. By the way it's a Scott 818

Can someone tell me if the 1962 printing contains all 21 stamps? Scott doesn't mention the 1962 printing.

And when some new values were released in I think 1975 (?), not long before Franco's death, several existing values were also reprinted with different paper and noticeably different colors. Scott (at least up to my 2017) only lists the new, unique denominations for this emission, not the reprints. One way to know for sure if you have new reprints from this date is they had coil numbers on some stamps. Some collectors hunt for these coil strips.

I don't think I own any stamps with coil numbers, but for the purposes of my collection knowing how to sort the shades is adequate. They are very obvious when you compare examples.

I've often wondered, for an issue that lasted approx 20 years, are there more printings that can be found?

Correction: the 4 new values were issued in 1974-1975. They are Scott #s 1852-1855

As has been written before, the '55 series lasted 20 years. In those 20 years everything evolved: machinery, pigments, paper, etc. Only for the value of 1 peseta, more than 4,000 million were printed.
There are numerous studies of the series, but absolutely nothing has changed in the catalogues.
I have the complete series, like millions of collectors, and the only variants that I observe are the same 2 as all, the imprint FNMT-B.

Are you referring to Scott's image A221? I found only one 25c stamp.
The OP refers to Scott 818.

Rob Roy the ones I know about were issued in 1960 according to Scott. They are indeed type A221 and the ones listed are 937-938. They were issued for the International Congress of Philately held in Barcelona, per Scott.

At the moment, I don't have any insight as to whether other values exist from that printing but I will check Michel and see what I find. It may take a Spain-specific catalog, which I don't have unfortunately.

Shermae, the stamps you mentioned are indeed Scott image A221, but not 25c. The OP's question was about A221 25c, and in my basic Scott catalog, as well as stampworld catalog, I could find only one stamp, Scott 818.

Rob Roy I'm confused. Here is an image of Scott's cat for Spain, and numbers 937-938 are* listed as type A221. My point in mentioning these stamps is that sometimes countries also reprint other values, but Scott won't list them unless the shade difference is very clear. Perhaps some other values were re-issued in 1960 when these 2 stamps arrived, but Scott doesn't list them. I don't know enough yet about this issue to know if other values were reprinted in 1960. Perhaps a reprinted 25c was issued in 1960.

We simply misunderstand each other. It happens.
The OP was talking about Scott's image A221, face value 25c. I couldn't find another A221 with the value of 25c besides Scott 818, as the OP mentioned.
You showed here values 1c and 5c, which are not what the OP claims to have.
Somewhere online I did see that the paper of Scott 818 was "Coated or normal paper". Maybe this helps.
(edited)

I see that you are still engaged in this.
Do you want more information? Here you have a lot taken from the two Spanish forums, in Spanish, of course.
These are mine:


Coil:



Emissions:

Papers:

Perforations systems:

Literature:

Cataloged color varieties:

Thank you, Roberto. The info you provided far exceeds that within Edifil's Catalogo Unificado de Sellos de Espana y Dependencias Postales.

Will be printing your information and retaining for future reference re color and paper varieties.

Nice collection and presentation, Roberto.
Indeed this answers the OP question about the 25c.
He said " 2 different papers one is a matte paper the other is a glossy", a source online said "Coated or normal paper", and your catalog clearly stated "Papel mate... Papel brillante".
Mystery solved. ;-)