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Scott's # 220 Reason For Cap Or Bleed Over ?

 
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Posted 09/02/2014   9:15 pm  Show Profile Bookmark this topic Add johnwelty to your friends list Get a Link to this Message
220 reason for cap or bleed over ?

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Posted 09/02/2014   10:58 pm  Show Profile Bookmark this reply Add stallzer to your friends list  Get a Link to this Reply
I see no cap over a 2, what do you mean bleed over ?
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Posted 09/02/2014   11:43 pm  Show Profile Bookmark this reply Add Partime to your friends list  Get a Link to this Reply
The left "2" looks a little overinked, but no cap.
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Posted 09/03/2014   07:07 am  Show Profile Bookmark this reply Add rohumpy to your friends list  Get a Link to this Reply
Agree, this is not a cap on 2 variety
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Posted 09/03/2014   07:08 am  Show Profile Bookmark this reply Add johnwelty to your friends list  Get a Link to this Reply
I was looking for caps and found 4 left and one left and right and left
then found this one thought it might be era before they fix area that produced the cap
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Posted 09/03/2014   09:18 am  Show Profile Bookmark this reply Add essayk to your friends list  Get a Link to this Reply

Quote:
I was looking for caps and found 4 left and one left and right and left then found this one thought it might be era before they fix area that produced the cap.




Your references to "fixing" the "area" that produced the cap betrays a fundamental misunderstanding of how the caps are formed, and therefore what to expect and look for in the matter of dealing with "caps."

To understand what the caps should look like in their many stages, it is necessary to understand how they come into being. That in turn requires enough of an understanding of the process and principles of siderography to be able to appreciate what to expect when things go wrong. The introduction to the Scott Specialized catalog gives a nice quick survey of the basic facts of how an intaglio image goes from die to transfer roll to plate and from plate to paper. If you do not have access to that you might google it.

The caps on these 2c stamps, which are unprinted (white) areas not spots of color, arise from a weakness in the transfer roll in which the designs on the roll, called reliefs, start to break and crumble. The correct term for them is "relief breaks" and these were a very hot topic of study and collecting interest in the 1930s. They are still of interest to a fair number of collectors and specialists.

Are you familiar with all this?
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Edited by essayk - 09/03/2014 09:23 am
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Posted 09/03/2014   12:07 pm  Show Profile Bookmark this reply Add johnwelty to your friends list  Get a Link to this Reply
Thanks for information I will look in to it more .
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Posted 09/03/2014   12:09 pm  Show Profile Bookmark this reply Add johnwelty to your friends list  Get a Link to this Reply
yes I do have a Scott Specialized catalog
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Posted 09/03/2014   12:36 pm  Show Profile Bookmark this reply Add essayk to your friends list  Get a Link to this Reply

Quote:
yes I do have a Scott Specialized catalog



That is excellent. I can't give you page numbers because that varies by year of publication, but there are two sections of interest. The first is near the beginning of the introduction where it describes and illustrates the term "Plate." You want to read and understand all of that section all the way through "Plate Arrangement" stopping just before Booklet stamps. Don't just read it once over lightly, really dig into it to understand it visually. You are being given the language that will help you analyze a process.

When you've got a handle on that, skip over a few pages to the section on "Printing." At least read about "engraving" and see if you can visualize it from what you read earlier. [For honor points you might want to try reading about one or two of the other printing methods to see if you can sense how they differ from engraving.]

Armed with this basic knowledge you are ready to tackle some of the literature on relief breaks and printing anomalies for this 2c stamp. It gets discussed here from time to time. Here is a link to earlier discussion that references some of the most recently published studies on these relief breaks:
https://goscf.com/t/38921 br /

There are more threads too, so you might try searching the list archives on the number 220.

Let us know if you run into a snag. If after all that you still are not sure what is going on with your stamps, we can help.
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