Once they were dry I ironed them to make the messages appear. I set the iron to the cotton setting and put a kitchen towel under the paper and ironed right on the cardstock. The heat broke down the acid in the juice and the message appeared! Invisible writing is such a great way to...
Keep your private text conversations secure on your iPhone. Learn these easy methods to hide or archive text messages without deleting them, including using invisible ink, password protection, third-party apps, and more.
Kristie Macrakis
More to learn Explore the latest gen AI insights Dive into the latest gen AI insights to uncover its transformative potential. Know more Realize the full potential of gen AI Discover how to overcome adoption barriers and achieve gen AI success ...
Philo of Byzantium, an inventor of the third century BC, described how crushed gallnuts, dissolved in water, could make invisible ink. Technology has shaped spycraft for millennia, but today it is h…
Most of these uses, as well as dozens of others, follow a common theme -- the black lights make the invisible visible or isolate one specific substance from everything around it. When you think about it, there are dozens of situations where you could put this phenomenon to work. The appl...
Brown ink can be created by steeping tea bags in boiling water and adding gum arabic. Prussian Blue ink is easy to make using Prussian Blue pigment and water for a bold blue color. Ink is one of the practical contributions of chemistry. Using basic materials found at craft supply stores, ...
Uh-oh Go back to CNET Homepage This is probably not the page you’re looking for. Sorry about that.
Follow these easy instructions to make nontoxic invisible ink, in just a few minutes, usingbaking soda(sodium bicarbonate.) The advantages of using baking soda are that it's safe (even for kids), simple to use, and readily available. Ingredients Baking soda Paper Water Light bulb (heat sourc...
Test the ink by applying it to fabric (cotton tee-shirt material or a tablecloth works well). Paper allows less interaction with air, so the color change reaction takes more time. In a few seconds, the "stain" will disappear. The pH of the ink solution is 10-11, but after exposur...