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Is This A Machin On Uncoated Paper?

 
 
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Pillar Of The Community
Australia
1959 Posts
Posted 12/12/2018   10:29 pm  Show Profile Bookmark this topic Add jimjamtwo to your friends list Get a Link to this Message
Odd looking Machin here. At left and right, the screening is very clear - much clearer than on normal Machins and the central phosphor band is more clearly visible than normal. Is that what stamps on uncoated paper look like? (If so, it would presumably be Connoisseur Catalogue #31UC.)

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Edited by jimjamtwo - 12/13/2018 02:56 am

Pillar Of The Community
United Kingdom
689 Posts
Posted 12/13/2018   03:02 am  Show Profile Bookmark this reply Add Ringo to your friends list  Get a Link to this Reply
I don't know the answer, but just to be clear, the phosphor bands are the thin stripes down the edges.
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Pillar Of The Community
Australia
1959 Posts
Posted 12/13/2018   05:57 am  Show Profile Bookmark this reply Add jimjamtwo to your friends list  Get a Link to this Reply
OK, thanks for pointing that out.
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Pillar Of The Community
United States
1221 Posts
Posted 12/14/2018   7:57 pm  Show Profile Bookmark this reply Add Trainwreck to your friends list  Get a Link to this Reply
The Deegam Machin handbook indicates the uncoated paper variety is from a sheet. Your stamp looks to be from a booklet, as evidenced by the cut perforation tips on the left and bottom.

In addition, the damaged area at the lower left seems to show some flaking of the surface coating.

I don't believe this is the uncoated paper variety.

Robert
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Pillar Of The Community
Australia
1959 Posts
Posted 12/15/2018   12:06 am  Show Profile Bookmark this reply Add jimjamtwo to your friends list  Get a Link to this Reply
So a new discovery then!
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Pillar Of The Community
Germany
1251 Posts
Posted 12/15/2018   04:21 am  Show Profile Bookmark this reply Add stamperix to your friends list  Get a Link to this Reply
hiw do you judge in general if it's on coated paper?
I usually look at it under oblique light if it has a "coated look", how do you all check this?
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Pillar Of The Community
United States
1221 Posts
Posted 12/15/2018   11:03 am  Show Profile Bookmark this reply Add Trainwreck to your friends list  Get a Link to this Reply
I examine the stamp with a strong magnifying glass or with a microscope. I look for cracking around the perforation holes. Most times, I see chips of the surface coating are missing, exposing the paper fibers beneath. Seeing these things, the stamp probably has some sort of surface coating.

Robert
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