Rainbow: Salt Crystal Painting

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Introduction: Rainbow: Salt Crystal Painting

About: I love craft.

Hello everyone,
This instructable is about salt crystal painting. It is a fun and interesting STEM activity that you can do with your child.
For this instructable I used a rainbow theme to make this painting as it was easy to draw.
The Science Behind The Salt Painting Science Experiment:
The salt absorbs or soaks up the water through a chemical action. Salt is hygroscopic which means that it can absorb both liquid water and water vapor in the air. This Salt Painting Science Experiment is a fun way to combine art and science together.

Supplies

Watercolors (Liquid watercolors are great for this activity. If you don’t have any, you can make your own by watering down food coloring.)
Paper ( thick paper or cardstock)(Any sturdy art surface will do. I've done this with card stock, poster board, cardboard, watercolor paper, paper plates, and foam core.)
Water
Table salt
Paint brush or eye dropper or pipette (whatever is easily available)
Pencil
Compass
Glue

Step 1: Drawing

To paint, we have to draw first. I made the drawing of a rainbow, which is very easy to draw, put your pencil in compass and draw concentric semi- circles.

Step 2: Sprinkle Salt

Squeeze glue onto the lines you drew of the rainbow. Start by the topmost one Violet ( I wrote the names of the colors but you don't have to do this) and then one by one climb down to Red.
Carefully sprinkle salt onto cardstock until the glue is thoroughly covered. Do this before the glue has dried so that the salt sticks to it well. Tip to let excess salt fall away. A baking dish or tray will help to contain the salt.

Step 3: Add Color

You can either wait for the glue to dry, or move directly on to coloring your creation.
Dip your paint brush into liquid watercolor paint then gently touch to the salt-covered glue lines. Watch the paint “magically” travel in both directions!
Try to drop the water only onto the salt crystals themselves, and not onto the actual cardstock. You can mix colors to see what new shades they make.
If you like, you can use a dropper or pipette instead of a paint brush to add your watercolor paint. You'd find that this can add a bit too much paint at a time, but I know that many people like this method. Set the salt crystal drawing to the side for several hours to dry completely before displaying. The drying process may even take a day or two.
Experiment with different designs and colors to see how your salt crystal paintings change. You can even try different different backdrops like cardboard and tin foil to see how those effect your paintings.
You can use this glue + salt + watercolor technique to write names/words, nature scenes, squiggles and scribbles, faces, and more!

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    10 Comments

    0
    romerogicelle
    romerogicelle

    9 months ago

    Me parece muy innovador e interesante cómo se combina la ciencia y el arte en esta bella pintura, actualmente estudio para ser maestra y esta idea me parece excelente para usarlo con mis futuros estudiantes

    0
    Prubdan
    Prubdan

    Reply 9 months ago

    Thank you!!

    0
    Not_Tasha
    Not_Tasha

    Question 11 months ago

    What kind of salt did you use?

    0
    Prubdan
    Prubdan

    Answer 11 months ago

    Regular table salt.

    0
    7skyies
    7skyies

    12 months ago

    I wonder if we can use batteries and pass current through salt(good conductor) to light up LEDs to make it even more colorfull
    Lovely project :-)

    0
    Prubdan
    Prubdan

    Reply 12 months ago

    That's a great idea!!!!
    Thank you!! :-)

    0
    Not_Tasha
    Not_Tasha

    12 months ago

    Love this! Will be using it with my students for our mini Maker Camp this summer!

    0
    Prubdan
    Prubdan

    Reply 12 months ago

    I'm sure your students will enjoy this activity.

    0
    joen
    joen

    12 months ago

    I would suggest that you use a clear coat on your finished artwork. High humidity can cause the salt crystals to liquify.

    0
    Prubdan
    Prubdan

    Reply 12 months ago

    Thank you for your suggestion, it will also give longevity to the painting.