There are printers that only have three colour cartridges - blue, red and yellow. With these printers, black printing is done by using all three colours - which seldom produces a really black ink. It is better to have a separate black cartridge for black printing, as it saves over-using the three colour cartridges. Colour cartridges are usually dearer than black cartridges. Also, avoid cartridges that combine the three colours in one fixed unit. For example, if the blue runs out, the whole cartridge will have to be replaced, even if there is red and yellow ink remaining. So always use three separate colour cartridges, that can be individually replaced, and one (usually larger) black cartridge.
Well because if it was just regualr ink(like old days) it would last very long..And it would dry out...
Black type shows well against the white of the page.
The evidence that exists that marker ink is a mixture is that the ink can be separated into black and other color pigments. This can be done on filter paper by dotting the marker just above the edge and adding ethyl alcohol, which drags the pigments separately across the paper.
There may be a difference in particular inks, but there is no general answer to this.
Dyes of different colors in black ink can be separated using chromatographic techniques.
pigments and other stuff
This merely depends on what color the ink is. Black ink is a mixture of at least 4 different colors.
Chromatography separates a mixture of pigments, usually in inks. You can separate colours in food and felt tips. The different solubilities of the different ink pigments, make some rise above others so you can see them clearly.
Black is a combination of all colors.
This industry classification is comprised of establishments engaged in manufacturing inorganic color pigments, white pigments, and black pigments, including animal black and bone black.
You can use the filter paper or chromatography paper to separate the different components in black ink.
can't get ink poisoning from a professionally done tattoo. some pigments however have minerals that can cause an allergic reaction. glow in the dark pigments seem to be the worst.
chromatography
Ink is made using an assortment of water, gums, and pigments (sometimes herbs or soot)