Jean Lab





Question:
What is the best concentration of bleach and tap water to fade jeans without damage to the Fibers?

The Solution:
The best way to test this is to combine the amounts of bleach and water and find the best solution to the best mixture.

Hypothesis:
If we put a medium amount of bleach and water on jeans, then the jeans will fade with minimal damage and maximum fade.

Process:
Put different concentration of bleach and water to fade color, and see which one fades to jeans the most and damages them the least.

What We Know:

  • Bleach is a base
  • Used on white clothes
  • Antibacterial
  • Removes pigment
  • eats tread
Materials:

  • Denim Jeans
  • Scissors
  • 5 250 ml beakers
  • tweezers
  • graduated cylinders
  • Waste bucket
  • 5 petri dishes
  • Bleach
  • Tap water


Preparation:

  1. cut 15 5x5 squares of denim fabric
  2. Of 60 ml prepare 5 solutions
  3. leave 3 fabric squares in petri dishes for 10 mins
  • 0 ml water 60 ml bleach
  • 15 ml water 45 ml bleach
  • 30 ml water 30 ml bleach
  • 45 ml water 15 ml bleach
  • 60 ml water 0 ml bleach
Label each beaker so you don't forget them

0 = None
10 = Severe
Concentration of Bleach
Color removal Average
100%
9.3
75%
7
50%
4.3
25%
3.3
0%
0



Concentration of Bleach
Fabric Damage Average
100%
6
75%
3.3
50%
3.3
25%
1
0%
0.3




Error:
In this lab we used bleach and water in the same measuring tools and for 0% bleach got some fabric damage.
A way to avoid any other errors is to use different measuring tools for bleach and water.
Another error that can happen is  not cutting the cloths the same size, but we avoided it in this experiment.
 
 Ways to make this Lab Better:
My suggestion is to use different types of bleach or other things that can fade the jeans. Another helpful thing might be to extent the period of time and make this experiment longer lake for a day, so the weaker solutions would have a better time to act.
 
Conclusion:
In conclusion the best bleach amount in 60 ml of liquid is 75% bleach. Even though it has some fabric damage, it has the most color removal to fabric Damage ratio. We had a mix up in the graduated cylinders for 0% bleach which caused some fabric damage so don't use the same cylinders for water and bleach. This lab could be improved by a longer wait time on the bleach and move it from 10 mins to 20. This experiment could be used by Jean companies to get faded fabric without destroying as much jean material.

Lesson:
This could be applied to what we learned about pH in class because jeans are obviously not the same pH as the jeans, because if they were, the jeans would not be eaten away.
  




Sources:
https://www.wikihow.com/Bleach-Pants





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