So it can be photocopied or scanned easier and clearly. also some DOD documents are edited or notated with different colored inks and it would cause confusion.
Using black and blue ink shows proffesialism, because your work will look more neat and professional when avoiding the use of colored ink. So when writing a formal letter by hand use black or blue ink.
Blue and black mainly.
It is best to use black or dark blue.
Yes fountain ink pen is allowed, however use only black or blue ink.
This was started years ago (prior to high quality color copiers) to help distingish between original signatures (blue ink) and copies (black in color).
black or blue
You can use black or blue ink to sign on a check. Actually there is no restriction on the color you can use to sign on a check as long as it does not blot on the check paper. Also, your writing should be clear and legible so that the bank authorities can verify it accurately.
Black ink
Memory recall refers to retrieving the memory of events or information from the past. No ink is needed, however, if you want to write things down, you can use any color ink you'd like. If you already keep a journal, you may want to use the same color ink you use for that.
It is generally not recommended to write prescriptions in red ink because it may be difficult to read or get misinterpreted. Most healthcare professionals use black or blue ink for clarity and consistency in medical documentation.
Black ink (typed and written) is the official color for ink used in the Navy for several reasons: 1. Blue and Red inks do not copy well (Xerox) when necessary. 2. Pencils are not allowed for official documents. 3. Red ink is used for document security classification and similar uses.
I prefer a yellow pen with black ink, that way I can find it in my purse and use it to sign important papers that must be in black ink only. i like all the colorful colors which is pretty muck everything besides black and blue different person