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What colored ink should be used for what purpose?

ParagS Kulkarni
Ranch Hand

Joined: Oct 04, 2004
Posts: 60
Is there any convention to use certain colored ink should be used for certain purpose. e.g. Black pen for something, Red for something, Green for something else.

Thanks, Parag
fred rosenberger
lowercase baba
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Joined: Oct 02, 2003
Posts: 11499
    
  16

In the U.S., many legal documents are supposed to be signed in blue ink. That way, it's easy to tell if something is an original or a photocopy (at least, before color copies became common).

WHY this makes a difference is unknown, but the court likes to have originals and the various lawyers and parties all get copies.


There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18991
    
    8

You may well have heard the term "red ink" referring to debt. That's an old accounting convention -- black for credits, red for debits -- but that hasn't really applied for years and now that computers do the accounting, it's history.
Pat Farrell
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Joined: Aug 11, 2007
Posts: 4659
    
    5

fred rosenberger wrote:In the U.S., many legal documents are supposed to be signed in blue ink. That way, it's easy to tell if something is an original or a photocopy (at least, before color copies became common). WHY this makes a difference is unknown


Because for a lot of scanners, blue is one of the colors that drop out. So a scanned copy of the document does not show the signature.

Most mono-chrome scanners and copiers have very strong differences in their ability to pick up some colors.

The use of "drop-out" color inks are common in business forms that are processed in high volume imaging applications, such as the US Census.
Pat Farrell
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Joined: Aug 11, 2007
Posts: 4659
    
    5

Paul Clapham wrote:You may well have heard the term "red ink" referring to debt. That's an old accounting convention -- black for credits, red for debits -- but that hasn't really applied for years and now that computers do the accounting, it's history.


Not fully history.

Even Excel can show negative values in Red, its a Format -> Cell option.

Its a standard within the accounting reporting world (at least in the US) and makes it easy to see when a project or division is not popular.

 
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