"I solemnly swear that I am up to no good." The phrase to make it blank again is, "Mischief managed."
no cows do not make ink they make milk.
Not likely. Tattoo ink may be removed from the blood, but it would appear in trace amounts in urine.
There is a special tree in India, and it has some kind of balls on it, and if you smash it you will get ink, so that's how you make Indian ink.
Molotow is paint and ink mixed together. To make it, just mix paint and ink together and use it in a pen.
to tell how you can make invisible ink
I think they used plants and minerals for ink.
Find a product called Ink Eradicator.
They need ink to make them work.If there is no ink in it,it will not work.Its the same as asking; Why do pens need ink to work? Its pretty obvious.
there is a simple answer at: http://www.instructables.com/id/E6J0VKCO8JEXCFDVUL/.
you can only get it from a squid... sorry... you cannot make a squid ink...
An optical lens can only bend light, not make something appear. An optical filter might help, but only under certain lighting conditions.