Hairlines On Two Cent Admiral Question

I see there're numerous stamps listed with the word hairlines or with hairlines but there's no pictures so I can only guess what to look for.
Are the fine lines running across this stamp what they are referring too?
I'm thinking this might be a 106-ix deep rose red hairlines?

Cheers, Bill

Yes, those are Hairlines. They are usually a little ragged ... ie, not perfectly straight. Good find.

If they form a triangle they're known as Delta Hairlines. If they're joined together they're called United Hairlines.

I would call these 'doctor blade" lines,


Peter

Appreciate the replies and my thanks to all.
So I assume this is not a 106-IX?
Would the Doctor blade lines make it any more collectable then one without?

Cheers, Bill

Hounddog Bill..Hairlines

Usually caused by bending of aluminum...Usually along horiz. lines due to metal fatigue.

Robert

Here is an example of a doctor (ductor) blade.

Interesting, are they discussed anywhere in Catalogue please?

Rod222
See hairline explanation on Ralph's re-entries.com site.
https://www.re-entries.com/terms.html#hl

Like I said, just metal fatigue..Not a constant variety.
Robert

Thank you.

Personally I find "Hairlines" on Bill's example questionable.
I can see hairlines as cracked / stressed aluminium (or whatever metal)
but Bill's appear to be accurate straight horizontal lines, not stress fractures.

The appearnce remains questionable to me, I'll leave that open.

There are stress fractures...Common on some stamps.

Robert

Rod, I fully agree with you. The lines on the OP's stamp look straight to me, without the ragged look of cracks

Peter

Yes Peter,
in all my years working with metal, I have yet to see a stress fracture in horizontal, parallel lines.
(My main observance would be the crakshaft bearings on internal combustion engines, that would often show stress)

I don't want this to be a slanging match, just respectfully disagree.
albeit, not sure where else to get an opinion.........

If the printing process included a ductor blade working horizontally, or, the stamps sheets proven to be printed sideways, I would tend to think these were ductor blade "chatter" lines.

Good philatelic research, should include a wide and varied opinion before a query is established beyond doubt, conducted in a respectful manner.

Hi rod222

I was a printer for 5 years in my youth..
I have burned many plates and had to make sure the plate was firmly against the drum.

Those marks on the original post are hairline cracks..which always happen 99.9% of the time horizontally.
left a couple of links for you to read up on.

Robert

The Offset pressman
http://offsetpressman.blogspot.com/...rinting.html

Kodak Reducing Plate Cracking
https://www.kodak.com/uploadedFiles...0Presses.pdf

Thank you Robert,
I am finally convinced you are correct,
I find it extraordinary that Bill's example lines are so straight and constant,
(Maybe from Plate 4)
I am also in note Hairlines can appear vertical as well (Booklets)
Thanks for initiating further study by your persistence,
The convincing evidence I found was here.........
http://www.bnaps.org/ore/VanSomeren...arieties.htm

Perhaps Houndog Bill can alter the Thread topic to .......
Canada Admiral "Hairlines" or something similar, for future students ?