However, the hackers of the world have the problem licked – enter the continuous ink system. [cprossu] wanted an affordable color printing solution for the hackerspace. A cheap printer was ...

Invisible Ink is one of the standout features Apple introduced to iMessage back in 2016, part of a suite of message effects designed to make texting feel more expressive. While others like "Slam ...

But not all of the new features are easy to find. SEE ALSO: 12 hidden features in iOS 10 The ability to send messages with the new "invisible ink" feature, along with some of the other new effects ...

A 110-year-old lemon used by a German WW1 spy to send secret messages from Britain with invisible ink is going on display in MI5’s first ever public exhibition. The blackened and flattened fruit ...

"Epson designed EcoTank to address several pressing concerns from anyone who prints – the hassle and cost of buying ink cartridges, the high-cost of printing in color and running out of ink when ...

"I did one with disappearing ink with this incredible tattoo artist ... As a matter of fact, I even forgot that I did it because it's invisible." The tattoo can be revealed "with a certain light ...