Sweden, Europ. Nature Conservation Year 1970 Issue Question

Recently I borrowed the FACIT 2015 Special catalogue from the Harry Sutherland Library
at the VGG Philatelic Research Foundation in Toronto.

It's a superb catalogue written in Swedish and English which makes it easy to use.
I really should get myself a recent edition.
Engravers and designers are still listed but no printers.

I was interested in seeing what Facit had to say
about various stamps we had been discussing over the years.

As far as the European Nature Conservation Year stamp is concerned
here is snipped from the catalogue.




Facit states that 6 colours were used , print was by Combination offset and steel engraving recess.
Paper was Ordinary with fluorescent overprint (Finnish)

The Swedish Stamp Printing Works didn't have a press like that in 1970.
The Bank of Finland Security Printing House had installed a 6 colour STIF press in the early 1960's
which could handle that.
This French built printing press printed 3 colours direct recess and 3 colours indirect(offset)recess.

See previous thread about STIF https://goscf.com/t/37831

I believe now that the stamps were printed in Finland.


One thing still puzzles me though.

G: Cz Slania was the engraver but what is meant by line-etched photogravure (value numbers) ?

Over my head,
would this be pertinent?
http://www.uwe.ac.uk/sca/research/c...revival.html

Rod , any information which helps us to get a better understanding
about print techniques is welcome here.

Thanks for the link.

FACIT also confirms that for Scott 1027 The Goose Girl
two plates were used or as the catalogue states:
Steel engraving recess in two operations

Still over my head.
Would it be a combination of "hand pulled Etching" and photogravure?

http://www.meadowlarkgallery.com/ph...setching.htm

The Facit description of the Nature Conservation Year stamps does seem mysterious. It may be that for some unknown reason the tagging and photogravure-printed value numbers ("55" and "70") were done in Finland. Finland has a history of photogravure printing with some of its earlier stamps.

I found this on Rod's Sweden:Steiner pages thread the other day.

Quite an interesting article which contradicts FACIT's claim
that 2 operations (passes) were needed to print six colours.

This says that only one cylinder was used and that half of
the cylinder was inked and printed 3 light colours and the
other half was inked and printed 3 dark colour and all
this simultaneously.

But if all this was done on one pass through the press
then why the colour misrepresentation we clearly see on some
of these stamps?