Related Links

  • Science Fair Project Guide

Project Summary

Difficulty  5 
Time required Average (about one week)
Prerequisites None
Material Availability Specialty items: fiber-reactive dye and soda ash are necessary. See the Materials and Equipment list for more details.
Cost Low ($20 - $50)
Safety Safety goggles and rubber gloves are needed for some steps. See the Experimental Procedure for more details.


Share this Project Idea!


Facebook Twitter Delicious Digg MySpace |More Services


Donate to Science Buddies

Sponsor

Sponsored by a generous grant from the Camille and Henry Dreyfus Foundation

Abstract

The clothes you wear are made of fibers that come from many different sources. Some fabrics are made from natural fibers, and some from manufactured or totally synthetic fibers. In this science fair project, you'll explore how different fiber types react with dye. Aren't you just dye-ing to find out which works best?

Objective

The goal of this science fair project is to test how strongly fiber-reactive dyes color different fabric types.

Introduction

From the shrouds of mummies in ancient Egypt, to the ball gowns of ladies in the Victorian era, to the tie-dyed shirts of modern hippies, dyed cloth has played an important role in human society. Early dyes were made using natural resources, like plants, berries, minerals, and seeds. Some of the earliest examples of cloth dyed with these natural substances come from ancient Egypt during the time of the New Kingdom during the reigns of pharaohs like Queen Hatshepsut and King Tutankhamen. Archeological finds from China and India also contain early examples of dyed cloth.

During ancient times, the cloths, just like the dyes, were made from a natural resource—natural fibers, like cotton, linen, and wool. Later, as advancements were made in chemistry and manufacturing, humans learned to make other fibers, like polyester, nylon, and rayon, known as synthetic fibers.

In addition to what type of material they are made from, another way to categorize fibers is by their chemistry. Cotton and linen fibers are cellulose-based (as is rayon, a manufactured fiber). Cellulose is the main component of plant cell walls—cotton fabric is made from cotton plants and linen is made from flax plants. Wool and silk are both animal-protein-based natural fibers. Wool is made from the hair of sheep, and silk is made from silkworm cocoons.

Although dyes were originally made from natural sources, today's dyes are often synthesized (made) by chemists. By understanding how the molecules of dye react with the fibers, chemists can design many vibrant and color-fast (meaning the dyed color doesn't fade or run off when washed) dyes.

In this science fair project, you'll study one type of dye, called fiber-reactive dye, by dyeing several different types of fabrics with the same dye. Which fiber types will react most strongly with the fiber-reactive dye? You'll judge the results by comparing the colors of your fabric samples. One quantitative way to categorize colors is by hue, saturation, and brightness. The Bibliography, below, has references to get you started on your research about dye and fabric chemistry, as well as color. So read up, formulate your hypothesis, and start coloring. Who knows, in the end you might be able to put your new-found understanding of fabric dyes to work to create the ultimate tie-dye shirt!

Terms, Concepts and Questions to Start Background Research

Questions

Bibliography

These websites offer insights into the history of dyeing cloth:

Information about types of fibers and textiles can be found at these websites:

These references contain information about the chemistry of fiber-reactive dyes:

Consult these references for information on describing color with HSB:

Materials and Equipment

Note: The fiber-reactive dye powder, soda ash, and textile detergent listed below are all specialty items. You may be able to purchase them at a local craft store. If not, they are available from online vendors like the Dharma Trading Co. at www.dharmatrading.com.

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 receives no consideration, financial or otherwise, from suppliers for these listings. (The sole exception is any Amazon.com or Barnes&Noble.com link.) 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.

Experimental Procedure

Important Notes Before You Begin:

  1. Do your background research so that you are knowledgeable about the terms, concepts, and questions above. In particular, you should learn about the different fiber types used in fabrics, and about fiber-reactive dye chemistry.
  2. Pick several different types of fabric to dye; try at least five. Use your background research to make predictions about how well different fabric types will be dyed with fiber-reactive dyes.

Dyeing the Fabric Samples

  1. For each fabric type, cut out three 20-cm x 20-cm squares. Use the permanent marker to label each of the squares with its fabric type.
  2. Pre-wash the fabric squares by putting them in a normal clothes washing machine with 1/4 cup of the textile detergent. Wash using hot water, if possible. Allow the fabric squares to air dry.
    1. The pre-washing removes any residual chemicals on the fabrics from the fabric manufacturing process (e.g., sizing, preservatives, or oils) that might interfere with the dye process.
  3. Put 2 teaspoons (tsp.) of powdered dye and 1 tablespoon (tbsp.) of salt in the glass jar. Add 1 cup of warm water and mix thoroughly to form a concentrated dye solution.
  4. Wet all the fabric squares and place them in the plastic bag. Carefully pour the concentrated dye solution into the bag. Add an additional 1/2 cup of water to the bag and seal it, being careful to trap as little air as possible in the bag.
  5. Let the bag and dye sit for 20 minutes. Every couple of minutes, gently squeeze the bag to evenly coat all the pieces of fabric with the dye.
  6. While the dye and fabric are soaking, make your soda ash solution. Caution: Soda ash is caustic. Wear eye goggles and gloves when mixing the soda ash solution, and when rinsing the fabric samples after dyeing.
    1. Put 2 tbsp. of soda ash in the plastic container. Add 1 qt. of warm water and mix thoroughly.
  7. After the dye and fabric samples have soaked for together for 20 minutes, carefully open the plastic bag and add 1/2 cup of the soda ash solution. Reseal the bag, being careful to trap as little air as possible.
  8. Gently squeeze the bag to completely mix the soda ash, dye, and fabric. Let the bag sit for 1 hour, gently squeezing every 10 minutes.
  9. After 1 hour, carefully dump the contents of the bag into a sink and rinse the fabric until the water runs clear. Caution: Make sure to wear your eye goggles and gloves during this step.
  10. Once the fabric is well-rinsed, do a final wash in the washing machine, using the textile detergent. This step is identical to step 2 and will remove any final dye particles which are not bound to the fabric. Allow the samples to air-dry.

Collecting and Analyzing Your Data

Your goal is to determine the effect of fabric type on the strength of the reaction between the fiber-reactive dye and the cloth (if there is any effect!). Below are two suggestions of how to collect and analyze your data—try both. You might be able to think of additional ways to analyze the data, too.

  1. Method 1: Look at all the fabric squares. Try grouping them by color. In a data table, like the one below, in your lab notebook, write down the type of fabric in each grouping, along with a description of the color.
    1. Do all the fabric squares of a particular fabric (for example, all three of the cotton fabric squares) belong in the same color grouping?
    2. Do color groupings contain more than one type of fabric?
    3. Have at least three other volunteers repeat step 1 of this section. Record the data from them, too. And compare it to your own visual groupings.
    4. How do your predictions compare to your results?


Table 1. This sample data table shows how to organize the type of data collected using method 1, above.

Group # Color Description Fabric Types
1 Brightest Cotton #1, Cotton #2
2    


  1. Method 2: Pick one of the fabric squares. Using the sliders in the color tool in Figure 1 below, adjust the hue, saturation, and brightness until the color on your monitor matches the fabric sample. Record the hue, saturation, and brightness values in a data table, like the one below, in your lab notebook. Repeat this step for all of the fabric squares.
    1. Calculate the average hue, saturation, and brightness values for each type of fabric. Graph the averages on a bar chart, where the x-axis is fabric type and the y-axis is the average value. You should have one graph for each type of value: hue, saturation, and brightness. You can use paper, or a website like Create a Graph to create your graph.
    2. Which fabric type has the highest average hue? How about saturation or brightness? What about the lowest average value for each of these? Would you describe each of those as the most or least strongly dyed fabric type?
    3. How do your predictions compare to your results?


Figure 1. This applet can be used to determine the hue, saturation, and brightness values of a particular color (Ed Abramson). If you cannot see the applet, try updating Java on your computer.



Fabric Type Hue Saturation Brightness
#1 #2 #3 Average #1 #2 #3 Average #1 #2 #3 Average
Cotton                        
Linen                        


  1. Note: You might want to take pictures of the fabric squares for your science fair project display board.

Variations

Credits

Sandra Slutz, PhD, Science Buddies

This science fair project is based on these sources:


Last edit date: 2010-01-29 15:00:00


Career Focus

If you like this project, you might enjoy exploring careers in Chemistry.

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.
  Chemical Engineer
Chemical engineers solve the problems that affect our everyday lives by applying the principles of chemistry. If you enjoy working in a chemistry laboratory and are interested in developing useful products for people, then a career as a chemical engineer might be in your future.

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.
 



Join Science Buddies

Become a Science Buddies member! It's free! As a member you will be the first to receive our new and innovative project ideas, news about upcoming science competitions, science fair tips, and information on other science related initiatives.


Support Science Buddies

If this website has helped you, won't you consider a small gift so we may continue developing resources to help teachers and students?

 



 

Science Buddies gratefully acknowledges its Presenting Sponsor
 
It's free! As a member you will be the first to receive our new and innovative project ideas, news about upcoming science competitions, science fair tips, and information on other science related initiatives.


Science Fair Project Home      Our Sponsors      Partners      About Us      Volunteer      Donate      Contact Us      Research Grants & Outreach      Site Map

Science Fair Project Ideas      Science Fair Project Guide      Ask an Expert      Blog      Teacher Resources      Parent Resources      Student Resources      Science Careers      Join Science Buddies     


Privacy Policy Science Buddies

Copyright © 2002-2010 Kenneth Lafferty Hess Family Charitable Foundation. All rights reserved.
Reproduction of material from this website without written permission is strictly prohibited.
Use of this site constitutes acceptance of our Terms and Conditions of Fair Use.