Glowing Glass Dip Pen and Invisible Ink Effect. Posted: April 16, 2025 | Last updated: May 31, 2025. More for You. House Democrats demand answers from Noem on plans for $50M jet.

I spy invisible ink pens that belong in the kids' stockings — snag a pack for $8 They have built-in UV lights and are suitable for children ages 3 and up, but you'll have fun using them too!

They have built-in UV lights and are suitable for children ages 3 and up, but you'll have fun using them too!

Fulbright told Crave that his company plans to sell pen and paper refills for $1 each (about 66p, AU$1.39), though, so the expense if you want to keep using Living Ink is fairly reasonable.

“Yes & Know” books came with an “invisible ink” marker pen and were just the thing for car rides. The games simultaneously had great variety and a resolute similarity.

Geek Life: Fun stories, memes, humor and other random items at the intersection of tech, science, business and culture. SEE MORE Lines drawn with Living Ink’s algae pen disappear in about 10 ...

If you’ve got a spare printer ink cartridge and a document you only want one person to see—or just some free time and a cloak-and-dagger kick ... Fill a Used Print Cartridge with Invisible Ink.

Living Ink Technologies has a goal to raise $15,000 to fund the development of the first time-lapse ink, with shipments estimated to deliver in March 2016. It's raised $4,904 so far, with 43 days ...

When Columbus officials suggested that residents mark the copper parts of their air conditioners with invisible ink to help head off a plague of thefts, they didn't say where to buy the pens.