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Tiger
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posted on 6th Jun 03 at 17:59 |
Banknote Production
Paper
Printing
Destruction
The Bank of England has issued banknotes since it was founded in 1694 and today all English notes are produced at Debden Security Printing Ltd, a subsidiary of De La Rue plc, situated at Loughton in Essex.
One of the aims at every stage is to ensure that the note is as difficult as possible to counterfeit. Some images are engraved by hand into metal plates, whilst others are created using a Computer Aided Design (CAD) system and are drawn onto film by a laserbeam. When finished, the images are duplicated many times onto printed plates ready for the presses. Specialised inks used to produce the notes are also manufactured on site; approximately 85 are required for the four denominations.
The watermark design is engraved in wax and, like the metallic thread, the image is incorporated into the paper as it is made.
The sheets of notes are then examined for flaws on a sheet examination machine (SEM) before the cypher and serial number are added.
Banknote Paper
The paper for Bank of England notes is made by a specialist paper manufacturer. It is manufactured from cotton fibre and linen rag, which makes it tougher and more durable than the more common wood pulp paper. Using copious amounts of water, the cotton is broken down into individual fibres and reformed into reels of paper of the quality required.
Banknote Printing Processes
Currently three printing processes are used in the printing of banknotes.
Offset Litho
Intaglio
Letterpress
Offset Litho
The printing plates, transfer the ink to the paper via an intermediate offset roller. This process is used to print most of the front and back of the note, except for the portrait of Her Majesty The Queen, the lettering and the numbering. Offset printing involves a number of separate plates with different colours superimposed in close register to produce high quality, clearly defined images.
Intaglio
Intaglio printing is used to add the portrait of Her Majesty The Queen and the lettering to the front of the note. The ink rests in grooves engraved into the plate. When the plate comes into contact with the paper the ink is forcibly 'drawn' from the plate onto the paper under very high pressure. This produces the raised print which is one of the characteristics that gives Bank of England notes their distinctive feel.
Letterpress
Letterpress printing is used for the cypher and serial numbers on the front of the note. Ink is transferred onto the raised letters and digits are printed onto the note.
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Tiger
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posted on 6th Jun 03 at 17:57 |
http://www.bankofengland.co.uk/banknotes/newten/security.htm
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MikeD
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posted on 6th Jun 03 at 17:45 |
im not made of money
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charcoalgrill
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posted on 6th Jun 03 at 17:44 |
SHOW ME THE MONEY!
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dannycorsa c
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posted on 6th Jun 03 at 17:40 |
quote: Originally posted by DanielJ
its made of money
i thought it grew on trees:mad:
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DanielJ
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posted on 6th Jun 03 at 17:38 |
its made of money
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leeshez
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posted on 6th Jun 03 at 17:37 |
Toilet paper, stick back plastic and a washing up bottle (true blue peter style) :lol: :wave:
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Phil Hall
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posted on 6th Jun 03 at 12:12 |
Sunshine Lollypops and, rainbows!
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Sam
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posted on 6th Jun 03 at 11:56 |
It's made from recycled copies of 'The Sun'.
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blebo
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posted on 6th Jun 03 at 11:56 |
A rough Cotton I belive
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3CorsaMeal
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posted on 6th Jun 03 at 11:55 |
do u wanna buy some plates? and the paper? i got some spare ink too, cheaper than most places...
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Hillzlo
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posted on 6th Jun 03 at 11:54 |
Anyone know?
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