Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Hillhouse students at work writing invisible ink messages ...

In this video I show you how I make magic ink using simple kitchen ingredients. I mix baking soda and water to write a hidden message, then create a turmeric and rubbing alcohol solution to reveal the ...

A Hillhouse student’s eyes widened as he applied grape juice and heat to what appeared to be a blank piece of paper — but instead held a secret message in invisible ink, written as part of a course ...