Stamp Community Family of Web Sites
Thousands of stamps, consistently graded, competitively priced and hundreds of in-depth blog posts to read
Stamp Community Forum
 
Username:
Password:
Save Password
Forgot your Password?

Welcome Guest! Need help? Got a question? Inherit some stamps?
Our stamp forum is completely free! Register Now!

Offset/Litho Printing But Has Photogravure Characteristics

 
To participate in the forum you must log in or register.
Author Previous TopicReplies: 10 / Views: 330Next Topic  
Pillar Of The Community
Canada
5102 Posts
Posted 03/26/2021   3:17 pm  Show Profile Bookmark this topic Add lithograving to your friends list Get a Link to this Message
Canada Post recently issued this nice souvenir sheet showing
crabapple blossoms.
It was printed by Canadian Bank Note using the offset/litho
process.
What I have noticed though is how similar offset has now
become to photogravure printing.
Lithography certainly has come a long way and is now the dominant
printing process in producing stamps.




Notice the ragged edges on the lettering and what appears to be
quasi screening on the green maple leaf.


Send note to Staff

Pillar Of The Community
792 Posts
Posted 03/26/2021   3:24 pm  Show Profile Bookmark this reply Add NSK to your friends list  Get a Link to this Reply
Send note to Staff  Go to Top of Page
Pillar Of The Community
Canada
5102 Posts
Posted 03/26/2021   4:06 pm  Show Profile Bookmark this reply Add lithograving to your friends list  Get a Link to this Reply
Thanks NSK for the link but as Rein states All stamps you showed are in offset-litho!

Could you show me other examples of photolithography similar
to the Canadian SS above.
Send note to Staff  Go to Top of Page
Pillar Of The Community
792 Posts
Posted 03/26/2021   4:37 pm  Show Profile Bookmark this reply Add NSK to your friends list  Get a Link to this Reply
The $1.70 and $1.90 are photolithography stamps. Offset lithography shows sharp outlines, not the screened dots that you often see in photogravure stamps.

Leigh-Mardon had photo-lithography presses.

https://www.stampsoftheworld.co.uk/..._Marine_Life
Send note to Staff  Go to Top of Page
Edited by NSK - 03/26/2021 4:49 pm
Pillar Of The Community
Canada
5102 Posts
Posted 03/26/2021   8:37 pm  Show Profile Bookmark this reply Add lithograving to your friends list  Get a Link to this Reply
Here are some Australian stamps I have from the early 1980s
printed via photolithography by Leigh-Mardon Pty Ltd.

They look like typical offset/litho stamps printed at that time.
See the rosette type pattern all in nice uniform rows.








Compare those to this one below from the Canadian souvenir sheet.






No comparison. Photo-lithography does not explain it.
Send note to Staff  Go to Top of Page
Pillar Of The Community
Netherlands
963 Posts
Posted 03/28/2021   05:56 am  Show Profile Bookmark this reply Add Galeoptix to your friends list  Get a Link to this Reply
What is here to explain?

Offset-litho with a stochastic screen?!
Send note to Staff  Go to Top of Page
Bedrock Of The Community
Learn More...
Australia
31929 Posts
Posted 03/28/2021   08:34 am  Show Profile Bookmark this reply Add rod222 to your friends list  Get a Link to this Reply
For the printing amateurs group,
to which I belong.....




As an artistic aside, here is Dianne Quinn, Modelling John Forrest's visage, Ludwig's lies waiting his turn, on the bench,
of Lithograving's stamp example.
1983
Send note to Staff  Go to Top of Page
Edited by rod222 - 03/28/2021 08:47 am
Pillar Of The Community
Canada
5102 Posts
Posted 03/28/2021   11:47 am  Show Profile Bookmark this reply Add lithograving to your friends list  Get a Link to this Reply
Thanks Rein and Rod.
Yes we discussed stochastic screening years ago on this
thread https://www.stampcommunity.org/topi...&whichpage=3

But this process used presently by Canadian Bank Note is
even "better" now IMO.

Send note to Staff  Go to Top of Page
Pillar Of The Community
Canada
5102 Posts
Posted 03/28/2021   12:05 pm  Show Profile Bookmark this reply Add lithograving to your friends list  Get a Link to this Reply
Rod that looks like the front page from the Sept-Oct 1983
Australian stamp bulletin

I received the Bulletin from AP for about 15 years and I really
enjoyed it.
It was full of interesting info until they changed the format.
Same story here with the Canada Post philatelic info where
we now have this flimsy little details pamphlet.
Send note to Staff  Go to Top of Page
Bedrock Of The Community
Learn More...
Australia
31929 Posts
Posted 03/28/2021   6:52 pm  Show Profile Bookmark this reply Add rod222 to your friends list  Get a Link to this Reply
That's it LG !

Yes, I am very proud of Australia Post's Bulletin,
a Great resource, I know SCF 22Crows knows them intimately.

The Bulletin is somewhat sullied by their merchandising,
but I can forgive them for that.
Send note to Staff  Go to Top of Page
Valued Member
United Kingdom
303 Posts
Posted 03/31/2021   02:32 am  Show Profile Bookmark this reply Add 65170 to your friends list  Get a Link to this Reply
As Rein commented, it is simply printed by offset with a stochastic screen, which has been used on postage stamps for around a quarter of a century. It has always given a superior appearance due to the random dot formation instead of using uniform dots.

As I wrote way back in 1997... https://www.stampprinters.info/1p59...ochastic.pdf
GLENN
Send note to Staff  Go to Top of Page
  Previous TopicReplies: 10 / Views: 330Next Topic  
 
To participate in the forum you must log in or register.


Go to Top of Page
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Stamp Community assumes no liability for errors. Copyright 2005 - 2021 Stamp Community Family - All rights reserved worldwide. Use of any images or content on this website without prior written permission of Stamp Community or the original lender is strictly prohibited.
Privacy Policy / Terms of Use    Advertise Here
Stamp Community Forum © 2007 - 2021 Stamp Community Forums
It took 0.22 seconds to lick this stamp. Powered By: Snitz Forums 2000 Version 3.4.05