x-ray glasses
If you can see through a highlighter, it may be running out of ink. Try pressing down on the tip or shaking it to see if more ink flows. If this doesn't work, it may be time for a replacement.
It depends on the printer you have. At some printers you have to print a page that says you the ink levels and at others you can see it through the printer's driver.
blob blob man
The only way to change skin color is through tattooing. OK, but please see discussion area.
Not completely. You may still see the black ink through the navy blue, coloured inks are opaque meaning there is colour but you can still see darker colours throuhg them. The only thing that will cover black ink is black ink. But some times you can get away with hiding it in a cover up. Have a few consultations with a tattooist in your area and see if they can design a cover up tattoo for you.
There are several tattooing designs and several methods of tattoing. But it is necessary to be informed and take all precautions befor you decide to go for tattooing. See details in the link.
A pen has ink in it so we can see the writing or you wouldn't be able to see what you wrote.
You should try it and see. Go to the kitchen, get a clear glass of water, and add a drop of food colouring to it. Or ink, if you have it. It's probably how quick the ink spreads through the water
When the blue ink is added, it (eventually) spreads evenly throughout the water through diffusion. See related links below for more information.
It's basically just a feather with some ink in the end to write with
Yes. It has a special ink used for getting away from predator. The ink is a blackish colour so the enemy can not see through it. as soon as the octopus squirts out the ink it escapes.
a blob