Home Store Project Ideas Project Guide Ask An Expert Blog Careers Teachers Parents Students

Colorful Chemistry Creations: Make Your Own Sun Print with Color and Sunlight!

Difficulty
Time Required Average (6-10 days)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety No issues

Abstract

You've probably heard of hand prints and fingerprints, but what about sun prints? To make a sun print, place an interesting object on a special sheet of sun print paper, expose it to the sun for a few minutes, immerse the paper in water, and watch as a permanent image appears! Sun print paper can be used to make beautiful and eerie prints, using just sunlight and water. Sunlight is actually a mixture of different colors of light. In this chemistry science fair project, you will test which colors of light work best to form sun print images.

Objective

Determine how different colors of light affect the brightness of a sun-print image.

Credits

David B. Whyte, PhD, Science Buddies

Cite This Page

MLA Style

Science Buddies Staff. "Colorful Chemistry Creations: Make Your Own Sun Print with Color and Sunlight!" Science Buddies. Science Buddies, 23 Oct. 2014. Web. 23 Nov. 2014 <http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p084.shtml>

APA Style

Science Buddies Staff. (2014, October 23). Colorful Chemistry Creations: Make Your Own Sun Print with Color and Sunlight!. Retrieved November 23, 2014 from http://www.sciencebuddies.org/science-fair-projects/project_ideas/Chem_p084.shtml

Share your story with Science Buddies!

I did this project I Did This Project! Please log in and let us know how things went.


Last edit date: 2014-10-23

Introduction

Take water, sunshine, and some creativity, and what have you got? Hours of enjoyment, making photographic-type pictures, called sun prints, shown below in Figure 1. Sun prints are made on special sun-print paper, which can be used to make images of all sorts of objects. To make a sun print, place an interesting object on a sheet of sun-print paper, expose it to the sun for a few minutes, dip the paper in water, and watch as a permanent image appears.



Sun prints of flower and household items.

Figure 1. Sun prints of a flower and of some household items.



When you expose sun-print paper to sunlight, and then rinse the paper with water, the areas of the paper that were exposed to sunlight appear dark blue. If there is an object blocking the sunlight, the paper under the object appears white. Sun-print paper has a light-sensitive chemical soaked into the paper. This chemical (called Berlin green) is a light-green color and it washes away when the paper is soaked in water. The chemical washes away because it dissolves in water (which means the chemical is water-soluble). When light hits the chemical Berlin green, it causes a light-activated chemical reaction. The product of the chemical reaction is a dark blue chemical, called Prussian blue, that does not wash away in water (meaning it is insoluble in water). Because the Berlin green washes off and the Prussian blue formed by the chemical reaction with light stays on the paper when rinsed, the areas that were shaded by the objects form white images on a blue background.

Sunlight is made up of red, orange, yellow, green, blue, and purple light. You can see the different colors of light that form sunlight when you look at a rainbow. When you expose the sun print to sunlight, all of these colors of light hit the chemicals in the paper. The goal of this chemistry science fair project is to determine which of the various colors of light that make up sunlight are best at forming images on sun-print paper. In the experimental procedure, below, you will write on a clear piece of plastic with permanent markers of different colors. This plastic with colored patterns on it will then be placed over the sun-print paper and the paper will be exposed to sunlight. The colored ink forms a sort of light filter. For example, the red ink will allow mostly red light through to the paper, while green ink will allow mostly green light through to the paper. If you have all of the colors of the rainbow on the plastic, which ones will form the brightest image when the paper is rinsed?

Terms and Concepts

  • Sun print
  • Light-sensitive chemical
  • Berlin green
  • Water-soluble
  • Chemical reaction
  • Product of a chemical reaction
  • Prussian blue
  • Insoluble
  • Light filter
  • Particle
  • Trial

Questions

  • Based on your research, what are the primary colors?
  • Why do you rinse the sun-print paper after exposing it to sunlight?
  • What are some water-soluble chemicals that you can find in your kitchen? What about insoluble?

Bibliography

News Feed on This Topic

 
, ,
Reading level:
Note: A computerized matching algorithm suggests the above articles. It's not as smart as you are, and it may occasionally give humorous, ridiculous, or even annoying results! Learn more about the News Feed

Materials and Equipment

  • Clear plastic sheet protector; available at any office supply store
  • Ruler, metric
  • Scissors
  • Sunprint or SunArt paper; available online from Amazon.com
  • Permanent markers, chisel tip; red, orange, yellow, green, blue, and purple
  • Timer
  • Cardboard, 30- x 30-cm piece
  • Water
  • Lab notebook

Disclaimer: Science Buddies occasionally provides information (such as part numbers, supplier names, and supplier weblinks) to assist our users in locating specialty items for individual projects. The information is provided solely as a convenience to our users. We do our best to make sure that part numbers and descriptions are accurate when first listed. However, since part numbers do change as items are obsoleted or improved, please send us an email if you run across any parts that are no longer available. We also do our best to make sure that any listed supplier provides prompt, courteous service. Science Buddies does participate in affiliate programs with Amazon.comsciencebuddies, Carolina Biological, and AquaPhoenix Education. Proceeds from the affiliate programs help support Science Buddies, a 501( c ) 3 public charity. If you have any comments (positive or negative) related to purchases you've made for science fair projects from recommendations on our site, please let us know. Write to us at scibuddy@sciencebuddies.org.

Share your story with Science Buddies!

I did this project I Did This Project! Please log in and let us know how things went.

Experimental Procedure

  1. Assemble the sun-print kit and other materials.
  2. Cut a 10-cm x 15-cm rectangle from the sheet protector plastic.
  3. Label the piece "#1" with small print in the upper left corner with the black permanent marker. This represents that this is your first trial.
  4. Write the following three-letter words on the plastic sheet, using the color of ink that is listed. You can use any pattern you like for the placement of the words, but keep the size of the letters the same.
    1. RED in red ink
    2. ORA in orange ink
    3. YEL in yellow ink
    4. GRE in green ink
    5. BLU in blue ink
    6. PUR in purple ink
  5. Cut a 10-cm by 15-cm piece of sun-print paper.
  6. Following the directions that came with your sun-print kit, make a sun print using the plastic sheet.
  7. Expose it to sunlight for 2 minutes. Use the timer to help you keep track of the time.
  8. Cover the sun print with the cardboard to stop the reaction at 2 minutes.
  9. Bring it inside and rinse and dry the paper.
  10. Look at your results.
  11. Make a data table for this trial in your lab notebook with each of the colors that you used.
    1. List the colors in order, with the color that has the brightest letters first.
  12. Repeat steps 2–11 two more times. This ensures that your results are accurate and can be repeated.
    1. Label the new plastic sheets in step 3 "#2" and "#3" for each new trial (a total of three trials).
  13. Based on your results, which colors form strong, weak, or no images? Can you see a pattern in the results? Remember, colors that form images are colors that do not cause the chemical reaction that forms Prussian blue.

Share your story with Science Buddies!

I did this project I Did This Project! Please log in and let us know how things went.


Variations

  • Try using colored lights. Which colors of light are best at forming sun-print images?
  • Is ultraviolet light required for the sun-print reaction? Use clear items that block ultraviolet light, such as glass, to test this. You can also see if sunscreen on plastic sheets forms an image.
  • Look up the wavelengths of the different-colored light. Add this data to the table.
  • Add a column to your data table that has the complementary color for each color of ink you used. Analyze your results in terms of which colors are blocked by the colored ink.

Share your story with Science Buddies!

I did this project I Did This Project! Please log in and let us know how things went.

Ask an Expert

The Ask an Expert Forum is intended to be a place where students can go to find answers to science questions that they have been unable to find using other resources. If you have specific questions about your science fair project or science fair, our team of volunteer scientists can help. Our Experts won't do the work for you, but they will make suggestions, offer guidance, and help you troubleshoot.

Ask an Expert

Related Links

If you like this project, you might enjoy exploring these related careers:

Picture of chemist

Chemist

Everything in the environment, whether naturally occurring or of human design, is composed of chemicals. Chemists search for and use new knowledge about chemicals to develop new processes or products. Read more
chemistry teacher conducting classroom demonstration

Chemistry Teacher

When you hear the word chemicals, you might think of laboratories and scientists in white coats; but actually, chemicals are all around you, as well as inside of you. Everything in the world is made up of chemicals, also known as matter, or stuff that takes up space. Chemistry is the study of matter—what it is made of, how it behaves, its structure and properties, and how it changes during chemical reactions. Chemistry teachers are the people who help students understand this physical world, from the reactions within our own bodies to how soaps and detergents work and why egg proteins can keep a cookie from crumbling. They prepare the next generation of scientists and engineers, including all healthcare professionals. They also help also students develop scientific literacy. Read more
female chemical technician monitoring experiment

Chemical Technician

The role that the chemical technician plays is the backbone of every chemical, semiconductor, and pharmaceutical manufacturing operation. Chemical technicians conduct experiments, record data, and help to implement new processes and procedures in the laboratory. If you enjoy hands-on work, then you might be interested in the career of a chemical technician. Read more

News Feed on This Topic

 
, ,
Reading level:
Note: A computerized matching algorithm suggests the above articles. It's not as smart as you are, and it may occasionally give humorous, ridiculous, or even annoying results! Learn more about the News Feed

Looking for more science fun?

Try one of our science activities for quick, anytime science explorations. The perfect thing to liven up a rainy day, school vacation, or moment of boredom.

Find an Activity