# Paper Towel Testing Name Block Date Paper Towel Testing Problems 1 Which brand

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```							Name____________________________                    Block________ Date_________

Paper Towel Testing

Problems:
1.   Which brand of paper towel is the most absorbent?
2.   Which brand of paper towel has the greatest wet strength?
3.   Which brand of paper towel is the most cost effective?

Procedure:
1:   As a class we will agree on a definition for absorbency and wet strength so that
we are all working on solving the same problem.
Write the definitions below so that you can refer to them.
Absorbency-

Wet strength-

2:    You need to design and carry out two experiments, one testing absorbency and
the other wet strength.
3:    In order to compare different group’s results we will be assigning a “Rank” to
each brand after testing. You should give the brand that achieved the best
average score a 4, the second best a 3, and the third best a 2, and the fourth
best a 1.
4:    One member of your group should record your results on the class data sheet.

This project will be graded as described below.

C=     Working with the team to complete the experiments and discussion
questions on absorbency, wet strength, and cost. Write report.
B=     Complete the work for a C and write a sales pitch for the brand
You think is the best, in the form of a magazine ad or poster.
A=     Complete work for a B and design a study to determine the
effectiveness of paper towels verses sponges. The study must include
relative costs, convenience, and the impact of each on the environment.
1. Cost Calculations
Use mathematics and any necessary assumptions and rank the towels according
to the following.

1.   Number of sheets in a roll
2.   Length of sheet (cm)
3.   Width of sheet (cm)
4.   Area of sheet (cm^2)
5.   Cost of roll
6.   Cost of one sheet
7.   Cost per cm^2

rankings. Use a clearly labeled data table.

Brand

Write a paragraph that states which the best deal is and what the worst deal is.
Explain how you decided this.
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Example
Brand        Cost of    #        Price/sheet Length    Width   Area     …..       ….
roll       sheets
Viva         1.00       80       .0125       20        25      500      …         …
2. Absorbency
Independent variables:

Dependent variable:

Replication:

Factor other than brand that you will control:

Hypothesis:

In the space below describe and sketch the experimental set-up you will use to
test the absorbency of the paper towels. After you receive teacher approval, you
can proceed and perform your experiment, making sure you carefully record your
data.

Teacher approval: ______________

Absorbency
Brand                                                                       Average.       Rank
Trial 1            Trial 2            Trial 3
A

B

C

D
3. Strength
Independent variables:

Dependent variable:

Replication:

Factor other than brand that you will control:

Hypothesis:

In the space below describe and sketch the experimental set-up you will use to
test the wet strength of the paper towels. After you receive teacher approval, you
can proceed and perform your experiment, making sure you carefully record your
data.

Teacher approval: ______________

Strength
Brand                                                                        Average.        Rank
Trial 1            Trial 2            Trial 3
A

B

C

D
4. Conclusion – Now, what one brand of paper towel is the best?         Justify your
choice based on your total study.

______________________________________________________________________
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Brand Ranks           Strength           Absorbency             Cost           Average

microscope drawings

Extra Credit: Calculate the above items and calculate the following items. Doing these
calculations in a spreadsheet will be the fastest and most accurate.
1. Absorbency of a full sheet
2. Absorbency per ply
3. Wet strength per ply
4. Cost effectiveness per ply
5. Absorbency per square cm
6. Absorbency per cent spent
7. Wet strength per cent spent
8. Absorbency per roll
9. You invent #9

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