Jean Lab

Jean Lab Conclusion

     In this lab we asked the question: What concentration of bleach is best to fade the color out of new denim material in 10 minutes without visible damage to the fabric? We found that the concentration with 50% bleach and 50% water was the best to fade the color out of the new denim material in 10 minutes. We had fifteen denim squares that were five centimeters long. We used three denim squares for each concentration. We had five different bleach test solutions. The most powerful solution had 100% bleach. We had 50%, 25%, and 12.5% dilutions of bleach. Our negative control had 100% water. The denim squares with 100% bleach were the lightest, and the denim with 100% water was the darkest shade of blue. There was not much visible damage on any of the denim squares. This data supports our claim because the concentration with 50% bleach and 50% water had the least amount of visible damage.

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     While our hypothesis was supported by our data, there could have been errors due to the way we put in our denim squares. Instead of putting three denim squares in to each solution, we put one denim square in at a time. This might have affected our results because the denim squares weren't all in the solution at the same time. Some squares might have been inside the solution for a few seconds longer than others. This could vary the affect on the denim squares. Some squares could be lighter than others because they were in the solution for a little bit longer. Due to these errors, in future experiments I would recommend putting all three trials in at the same time, and making sure that there is only one dependent variable. 
     This lab was done to demonstrate the amount of bleach necessary to fade denim jeans. From this lab, I learned how to do a lab, which helped me further understand the scientific method. Based on my experience from this lab, I learned that the 50% concentration of bleach is best to fade the color of denim jeans without destroying them. I also learned the importance of following the procedure, and the difference between dependent variables, independent variables, controls, and constants.

From left to right, 0%, 12.5%, 25%, 50%, and 100% bleach