Cayla Cornwell H-18
2/110/14

Tie Dye Lab

Design Used: Spiral

Materials Used:

1. Goggles
2. White T-shirt
3. Squirt Bottles of Dye
4. Rubber Gloves
5. Buckets
6. Rubber Bands\
7. Plastic Shopping Bag

Objective:
-Use the process of dying fabrics to illustrate chemical reactions, equilibrium, chemical bonding, and pH. 

Pre- Lab Questions
      1. Where did the art of dyeing fibers originated?

         

          The art of dyeing fibers originated in India or China in 2500 B.C.

      2.Originally, what type of substances were used to dye?

         

          Originally, plants, animals, and minerals were natural substances used to dye. Some examples are berries, roots, and flowers.

      3.What are the fibers of the shirt made of?

    

           The fibers of the shirt I used in class were made of 100% cotton.

      4.What chemical interaction is occurring when fibers are dyed?

            

           When dyeing fibers a covalent bond is formed.

  Interesting Facts :

                                                  1. The oldest Indian dyeing method is called Bandhani

(picture example to the right)

2.The Japanese form is called Shabori  

3.In 1856, William Henry Perkin began the synthetic organic chemical industry by accidentally discovering the purple dye, mauveine, when he tried to produce quinine from aniline.               

Procedure:       

1. The first step in this lab is to soak the shirt in hot water.
2. The next step is to grab protective gear, such as goggles and gloves.
3. Grab your shirt after it soaked for a little bit and start knotting the shirt into the design of your choosing.
4. Then, start dyeing the shirt with   chosen colors.(If there is a puddle while dyeing you are using to much).
5. Put shirt into a plastic shopping bag and let sit for about 24 hours or more.
6. After, spread shirt on protected surface to dry.
7. When shirt is dry it is recommended to put shirt in dryer on high or using a hot iron to seal color in shirt. 

 Post-Lab Questions:

1.If you dyed a rainbow spiral on a shirt and then soaked it in a black dye bath, the result would be a black shirt with a rainbow spiral pattern. Why doesn’t the entire shirt dye black?

The entire shirt does not dye black because the dye of the spiral already chemically bonded with the cotton fibers, because the dye molecules hold chromphore, which allows only certain spectrums to reflect.

2. What is the purpose of soaking the shirts in the hot water for 5 minutes?

The purpose of soaking the shirt in hot water for 5 minutes is to release the H from pH so it speed up the process of the bonding between the fiber and dye

3. Why is 100% cotton the best type of cloth to use with fiber reactive dyes?

100% cotton is the best type of cloth to dye with because it's fibers are naturally hollow wich allows the dye to bond on both the inside and outside of the fiber.

4. What are some advantages of fiber reactive dyes?

Some advantages of fiber reactive dyes is that they chemically bond to the molecules of the shirt so that they can never be washed out.

5. Explain how ionic bonding is used to dye the shirts in this lab.

Ionic bonding is used to dye shirts in this lab when we use the hot water to separate the H from pH so that the dye can bond with cellulose atom that had just lost the H atom