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Question On Printing Method

 
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1128 Posts
Posted 02/19/2022   10:57 am  Show Profile Bookmark this topic Add Al E. Gator to your friends list Get a Link to this Message
How do I distinguish the different printing methods used on the Machins? I appreciate any help with understanding how to tell the difference when viewing the stamps.
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Netherlands
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Posted 02/19/2022   11:35 am  Show Profile Bookmark this reply Add NSK to your friends list  Get a Link to this Reply
Photogravure and, later, gravure use a screen visible as dots. Under magnification, you will see that the coloured area has been made up from dots. This is best visible on the borders of the image, where the colour meets the unprinted area. Lithography has no dots and the outlines are sharp.

Engraving,sometimes used for the higher values, is made up of lines.
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Edited by NSK - 02/19/2022 11:43 am
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Netherlands
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Posted 02/19/2022   11:43 am  Show Profile Bookmark this reply Add NSK to your friends list  Get a Link to this Reply
This is typical photogravure. Look at the border, the number and the portrait at the top right and notice the dotted pattern or screened appearance of the portrait.



In later gravure done with computers, this becomes sharper, but the lithography is quite different.
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Netherlands
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Posted 02/19/2022   12:06 pm  Show Profile Bookmark this reply Add NSK to your friends list  Get a Link to this Reply
This is as difficult as it gets. Ireland 'Gerls.' The red one is photogravure, the turquoise one is lithography. When you look carefully, you will see the right outline on the red stamp has what looks like smears. Also look at the top bar of the '1.' These are the screen dots. The turquoise has running colours, but no dotted-pattern


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Edited by NSK - 02/19/2022 12:08 pm
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Posted 02/19/2022   12:47 pm  Show Profile Bookmark this reply Add Al E. Gator to your friends list  Get a Link to this Reply
Thank You very much!
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