Chemistry Projects

Prussian blue ink is one of the easiest blue inks to make. (Adrien Ledoux) — You can prepare your own blue ink. This blue ink recipe is very easy and produces a beautiful blue ink for writing, drawing, or crafts. BLUE INK INGREDIENTS Prussian Blue pigment (sold as a pigment or sometimes as laundry bluing) water PREPARE BLUE INK It’s extremely easy! Mix the pigment into the […]

Blue Ink Recipe

This entry was posted on December 25, 2017 by Anne Helmenstine

Ancient tattoo ink recipes produce ink that is black or brown. (Giulia Bertelli) — This ancient tattoo ink recipe was devised by the Roman physician Aetius. It can be expected to produce a nice permanent iron-based ink, though the ingredients may cause irritation for some individuals. The reader is advised that this recipe is of historical significance, but safer and higher quality inks are available […]

Ancient Roman Tattoo Ink Recipe

This entry was posted on September 11, 2017 by Anne Helmenstine (updated on November 6, 2017)

The black snakes will burn on their own if you get them hot enough. — Black snake fireworks are also known as Pharaoh’s snakes, Pharaoh’s serpent, or glow worms. Although called “fireworks” they are a type of small pyrotechnic that doesn’t explode or even give off sparks. When you light a black snake, it pushes out a column of ash that sort of resembles a […]

Make Black Snake Fireworks Using Calcium Supplements

This entry was posted on April 12, 2017 by Anne Helmenstine (updated on September 6, 2018)

Electroactive slime is a opaque slime that reacts to static electricity. (Josh Hallett) — This recipe makes cool, non-toxic slime that appears to have a life of its own! It’s electroactive slime, so it reacts when it’s close to electrically charged objects. Rub a piece of polystyrene foam or a balloon on your hair or a wall to charge it and observe how the […]

Cool Electroactive Slime That Reacts to Styrofoam

This entry was posted on February 13, 2017 by Anne Helmenstine (updated on February 13, 2017)

Use translucent glycerin soap to make soap slime you can see through. (darwin Bell) — Soap slime is an easy-to-make type of slime that is fun to play with and makes clean-up fun. Here’s how you make it. Soap Slime Materials leftover pieces from bars of soap (or you can use a whole bar) water jar Make Soap Slime You’ve probably made soap slime accidentally […]

Super Easy Soap Slime Recipe

This entry was posted on February 13, 2017 by Anne Helmenstine (updated on May 16, 2017)

Cobalt(II) chloride may appear either pink or blue in solution, depending on which ion is formed. (Chemicalinterest) — This color change chemistry project will give you a liquid that fluctuates between pink and blue as the temperature changes. In essence, it’s a color change thermometer. What You Need beaker or attractive clear container 3 g cobalt(II) chloride hexahydrate (also known as cobaltous chloride hydrate) 500 ml alcohol Prepare […]

Make a Color Change Liquid Thermometer

This entry was posted on January 27, 2017 by Anne Helmenstine