Tag: cabbage’

Lemon-painted Eggs

 - by KitchenPantryScientist

We’ve often used the water from boiling red cabbage to make Litumus (acid-indicator) paper, but last year, we used it to make egg dye!  Simply follow the directions here to make your cabbage “juice” and put hard boiled eggs in the cabbage juice to dye them blue.  Boil your eggs in the cabbage juice and refrigerate them in the juice overnight for the best color!  The juice turns pink when you add an acid to it, so when your eggs are dry, you can paint pink designs on them with lemon juice or vinegar using paintbrushes, toothpicks or Q-tips.  You can also dissolve baking soda in water (which makes a base) to add more color to the eggs (greenish-blue which shows up when they dry.)  Here’s a video of a demonstration I did on Kare11 news of this experiment.

Try some other natural egg dyes!  Boil colorful fruit, vegetables and spices with 4-8 cups water and a few Tbs. of white vinegar.  When the water is boiling, add raw eggs and boil for 10 minutes.  The pigment in the fruits and veggies will be absorbed by the egg’s porous surface as they cook.  Let the eggs sit in the dye until cool.  Then, wrap the wet eggs in onion skins or rub with paprika for yellow.  We had the best luck with blueberries, curry and red cabbage.  Experiment  to see what makes the best colors!  What worked best for you?  Coffee?  Tea?  rhubarb? Don’t forget to eat your creations.  Hard-boiled eggs make a great snack!

Food Science: Red Cabbage Litmus Paper

 - by KitchenPantryScientist

This is a great science project and results in beautifully colored paper that can be dried and used for art projects like collages.

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All you’ll need is a head of red cabbage and some paper towels or white coffee filters.  Alternately, you can just use the juice from canned red cabbage.  I’d recommend wearing an old tee shirt or a home-made lab coat for this project, since I’m guessing that cabbage juice stains.   To make a lab coat, just have kids write their name in permanent marker on the pocket of an old button-down shirt. 

Chop half a head of red cabbage into small pieces and add it to a pan with about a cup of water.  Boil the cabbage uncovered for about 15 minutes, stirring occasionally, let it cool, and strain the juice into a jar or bowl.  (Save the cooked cabbage for your favorite recipe and make cole slaw with the other half!)

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If you want to avoid the stove, chop half a head of red cabbage and blend it with about 3 cups of water. Strain the liquid through a colander and then through a coffee filter in a plastic bag with one corner cut off. Blended cabbage juice makes longer-lasting bubbles and turns a slightly brighter shade of blue!

Cut the paper towels or coffee filters into strips about an inch wide and a few inches long and soak them in the cabbage juice for about a minute.  Remove them and let them dry on something that won’t stain.  I blotted them a little to speed up the drying process.  You might even try using a blow dryer!

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When dry, your litmus paper will be ready to use for testing acidity.  Your can dip the paper into orange juice, soapy water, lemon juice, baking soda in water, baking powder in water, vinegar, and anything else they want to test.  The paper will turn red-pink in acids and blue or green in bases. 

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Everything in our world is made of very tiny pieces called atoms.  Atoms are so small that if you blow up a balloon, it will contain about a hundred billion billion atoms of the gases that make up air.  Atoms are often bonded to other atoms to form a group of linked atoms called a molecule.  A water molecule, for example, has two hydrogen atoms and one oxygen atom, bonded together.

Acids usually dissolve in water to form free-floating hydrogen atoms.  Bases are the opposite and take up free hydrogen atoms.  The molecules in the cabbage juice litmus paper change when exposed to an acid or base, making the paper change color.

Red Cabbage Litmus Paper

 - by KitchenPantryScientist

This is a great science project and produces beautifully colored paper that can be dried and used for art projects like collages.

img_2353

All you’ll need is a head of red cabbage and some paper towels.  Alternately, you can just use the juice from canned red cabbage.  I’d recommend wearing an old tee shirt or a home-made lab coat for this project, since I’m guessing that cabbage juice will stain.   To make a lab coat, just have kids write their name in permanent marker on the pocket of a man’s old button-down shirt.  They’ll love it!

Chop half a head of red cabbage into small pieces and add it to a pan with about a cup of water.  Boil the cabbage uncovered for about 15 minutes, stirring occasionally, let it cool, and strain the juice into a jar or bowl.  (Save the cooked cabbage for your favorite recipe and make cole slaw with the other half!)

img_2335

Cut the paper towels into strips about an inch wide and a few inches long and soak them in the cabbage juice for about a minute.  Remove them and let them dry on something that won’t stain.  I blotted them a little to speed up the drying process.  You might even try using a blow dryer!

img_23382

When dry, your litmus paper will be ready to use for testing acidity.  Your can dip the paper into orange juice, soapy water, lemon juice, baking soda in water, baking powder in water, vinegar, and anything else they want to test.  The paper will turn red-pink in acids and blue or green in bases.  Even very young children will love this experiment!  The colors we saw were amazing.   Have your child tape a strip or two of the paper into their lab notebooks.

img_2361

Everything in our world is made of very tiny pieces called atoms.  Atoms are so small that if you blow up a balloon, it will contain about a hundred billion billion atoms of the gases that make up air.  Atoms are often bonded to other atoms to form a group of linked atoms called a molecule.  A water molecule, for example, has two hydrogen atoms and one oxygen atom, bonded together.

Acids that usually dissolve in water to form free-floating hydrogen atoms.  Bases are the opposite and take up free hydrogen atoms.  The molecules in the cabbage juice litmus paper change when exposed to an acid or base, making the paper change color.

Now I know why my mom’s delicious Pennsylvania Red Cabbage recipe turns red when we add the vinegar!