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What we collect!
What we collect!


General Philatelic/Gen. Discussion : fascinating video!!!

 

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Harvey
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This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!

05 Nov 2022
03:27:11pm
https://www.youtube.com/watch?v=13ofj66U ...
This video is not "fascinating" because of the two stamps it talked about that I will never find. It has a great description of the difference between rotary press and flat plate printing. If I am disobeying some rule by showing this video please just delete it, it was unintentional!!

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""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
1898

05 Nov 2022
08:52:37pm
re: fascinating video!!!

I did not watch the video, as there is a free way to determine flat plate printing vs rotary plate printing stamp. Just turn the stamp over and look at the reverse, if there is offsett ink, then it's flat plate printed, if no offsett ink then it's rotarty press plinted.


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Harvey
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This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!

05 Nov 2022
09:40:14pm
re: fascinating video!!!

Watch it anyway! It really has some interesting content and it's never too late to pick up little bits of information, even at our ages!! I used to think I knew everything and was always right, well I was wrong. Rolling On The Floor Laughing

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""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
DannyS
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05 Nov 2022
09:46:19pm
re: fascinating video!!!

At what point in the flat plate printing process was the back coated with gum?

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Harvey
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This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!

06 Nov 2022
11:38:54am
re: fascinating video!!!

I'm guessing a bit but here goes. All of this should be easy to check if we knew someone who worked where it was done. This might also be different in other countries. I'm guessing that the glue was put on first. The reason is that re-gummed stamps can be detected by the way the glue collects around the perforation holes. You also see stamps printed on the gum side which tends to imply the gum was applied first. My guess is the design is applied next and the perforation done last. That makes sense (to me) since you wouldn't want to apply ink over "holey" stamps! I might be totally out to lunch with all this, it wouldn't be the first time!! It makes me wonder if you can only tell flat plate by ink on the back with mint stamps since removing the gum should also remove the ink. Is this true - I have no idea!! You would also have problems with stamps on cover or piece unless you had another way to tell, i.e., measuring of design. All this is pure speculation!!

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""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
1898

06 Nov 2022
02:14:37pm
re: fascinating video!!!

I viewed the video Harvey suggested. The gauage is one of the US specialty from some time ago. I have one but don't use the flat press/rotary press go/no go gauage, as you have to line up X/Y points, my way is much faster!

I cut mine up for just the parts that are interest to me, actually makes it easier to use!


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DannyS
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06 Nov 2022
07:05:25pm
re: fascinating video!!!

"I'm guessing that the glue was put on first. The reason is that re-gummed stamps can be detected by the way the glue collects around the perforation holes. "



Joe, I don't think they could have used gummed paper in the flat plate printing process as it was too "wet". The perforations must have come last because of what you say on re-gummed stamps. I'm now guessing it must have been done in between these two points. That would mean that looking for offset ink on used stamps makes sense.

Now I'm confusing myself. Was the offset ink on rotary press printing rather than flat plate?
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Harvey
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This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!

06 Nov 2022
07:27:02pm
re: fascinating video!!!

"Was the offset ink on rotary press printing rather than flat plate?"


Flat plate I think.
And you're probably right about the order. Surely one of you must know the answer to this!!

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""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
DannyS
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07 Nov 2022
06:36:03am
re: fascinating video!!!

I think I'm confusing myself. In my small part of the publishing world the word offset means something different. Web offset printing would be rotary I guess, but that has nothing to do with the ink pickup on the flat plate printing.

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Author/Postings

This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!
05 Nov 2022
03:27:11pm

https://www.youtube.com/watch?v=13ofj66U ...
This video is not "fascinating" because of the two stamps it talked about that I will never find. It has a great description of the difference between rotary press and flat plate printing. If I am disobeying some rule by showing this video please just delete it, it was unintentional!!

Like 
1 Member
likes this post.
Login to Like.

""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
1898

05 Nov 2022
08:52:37pm

re: fascinating video!!!

I did not watch the video, as there is a free way to determine flat plate printing vs rotary plate printing stamp. Just turn the stamp over and look at the reverse, if there is offsett ink, then it's flat plate printed, if no offsett ink then it's rotarty press plinted.


Like
Login to Like
this post

This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!
05 Nov 2022
09:40:14pm

re: fascinating video!!!

Watch it anyway! It really has some interesting content and it's never too late to pick up little bits of information, even at our ages!! I used to think I knew everything and was always right, well I was wrong. Rolling On The Floor Laughing

Like
Login to Like
this post

""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
Members Picture
DannyS

05 Nov 2022
09:46:19pm

re: fascinating video!!!

At what point in the flat plate printing process was the back coated with gum?

Like
Login to Like
this post

This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!
06 Nov 2022
11:38:54am

re: fascinating video!!!

I'm guessing a bit but here goes. All of this should be easy to check if we knew someone who worked where it was done. This might also be different in other countries. I'm guessing that the glue was put on first. The reason is that re-gummed stamps can be detected by the way the glue collects around the perforation holes. You also see stamps printed on the gum side which tends to imply the gum was applied first. My guess is the design is applied next and the perforation done last. That makes sense (to me) since you wouldn't want to apply ink over "holey" stamps! I might be totally out to lunch with all this, it wouldn't be the first time!! It makes me wonder if you can only tell flat plate by ink on the back with mint stamps since removing the gum should also remove the ink. Is this true - I have no idea!! You would also have problems with stamps on cover or piece unless you had another way to tell, i.e., measuring of design. All this is pure speculation!!

Like
Login to Like
this post

""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
1898

06 Nov 2022
02:14:37pm

re: fascinating video!!!

I viewed the video Harvey suggested. The gauage is one of the US specialty from some time ago. I have one but don't use the flat press/rotary press go/no go gauage, as you have to line up X/Y points, my way is much faster!

I cut mine up for just the parts that are interest to me, actually makes it easier to use!


Like
Login to Like
this post
Members Picture
DannyS

06 Nov 2022
07:05:25pm

re: fascinating video!!!

"I'm guessing that the glue was put on first. The reason is that re-gummed stamps can be detected by the way the glue collects around the perforation holes. "



Joe, I don't think they could have used gummed paper in the flat plate printing process as it was too "wet". The perforations must have come last because of what you say on re-gummed stamps. I'm now guessing it must have been done in between these two points. That would mean that looking for offset ink on used stamps makes sense.

Now I'm confusing myself. Was the offset ink on rotary press printing rather than flat plate?
Like 
1 Member
likes this post.
Login to Like.

This is my diabetic cat OBI! I think, therefore I am - I think! Descartes, sort of!
06 Nov 2022
07:27:02pm

re: fascinating video!!!

"Was the offset ink on rotary press printing rather than flat plate?"


Flat plate I think.
And you're probably right about the order. Surely one of you must know the answer to this!!

Like
Login to Like
this post

""We have multiplied our possessions but reduced our values. We talk too much, love too seldom, and hate too often. We’ve learned how to make a living but not a life. We’ve added years to life, not life to years." George Carlin"
Members Picture
DannyS

07 Nov 2022
06:36:03am

re: fascinating video!!!

I think I'm confusing myself. In my small part of the publishing world the word offset means something different. Web offset printing would be rotary I guess, but that has nothing to do with the ink pickup on the flat plate printing.

Like
Login to Like
this post
        

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