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Nicole Chan

on 22 August 2013

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Background Info:



Reflection, Validity and Reliability:

Nicole Chan 10Yellow
Variables and Risk Assessment:
To find out which brand of toilet paper has the best water absorbency.
The brand “Sorbent” toilet paper will be the most absorbent as the texture of the paper feels rougher and thicker than the other brands. Also, the “HomeBrand” brand of paper has a soft and thin texture therefore making it the weakest of the four brands of toilet paper.
1. Clip the square of toilet paper onto the top of both ends of the bookend.
2. Place two packs of six (250ml poppers) onto the bottom of each side of the bookend to support it.
3. Fill eyedropper up completely and use the plate to practice squirting one water droplet, keeping its size consistent as possible.
4. Squeeze one droplet of water on to the center of the square of toilet paper 5 centimeters above it.
5. Wait at least 30 seconds so that the water can spread as far as possible.
6. Carefully measure the circumference of the wet circle.
7. Repeat this method five times for each different brand of toilet paper.

To conclude according to the results, it can be confirmed that the “Sorbent” toilet paper is the most absorbent 2 ply toilet paper brand used within the experiment. The circumference of this brand of toilet paper by far had the lowest average of only 2.04cm absorbed from one droplet whereas the "Tork" brand of toilet paper proved to be least absorbent with one droplet spreading to an average circumference of 3.18cm. My hypothesis on "Sorbent" being the most absorbent brand of toilet paper was correct but "Tork" came out as the least absorbent with an average circumference over 3cm was not predicted.
Within the conduction of this experiment, the main difficulties that arised were holding the eye dropper stably 5cm above the square of toilet paper and keeping the size of each water droplet consistent throughout the experiment. 2 packs of 6 (250ml) poppers were placed on each side of the bookends to ensure that the structure of the experiment would not collapse and before each droplet of water was squeezed onto the square of toilet paper, it was tested in a plate, to ensure consistency of size between the droplets.

Improvements that could be made in the carrying out of this experiment include the use of machinery or specific eye droppers which can only let out a droplet of the same size each time it is squeezed so that more reliability and consistency is created.

According to the results, it can be perceived that the “Sorbent” toilet paper was tested to be the most absorbent 2ply toilet paper brand, while on the contrary the “Tork” toilet paper turned out to be the weakest. The texture of both "Kleenex" and "Sorbent" toilet paper was soft yet thick therefore these two brand would be a popular, common choice when bought in supermarkets. This juxtaposes to the cheaper "Home Brand" toilet paper and "Tork" toilet paper which is often used in workplaces or schools. These results prove that when using the cheaper and less absorbent brands, we use more squares of toilet paper opposed to the fact that we use less with the more absorbent and comfortable brands. Although this experiment may perhaps seem trivial to some people but just something as simple as toilet paper absorbency can affect our daily lives.

• Woolworths Home brand toilet paper (2 ply)
• Sorbent: Gentle Tissue toilet paper(2 ply)
• Tork toilet paper(2 ply)
• Kleenex: Luxury Embossing toilet paper (2 ply)
• 2 Metal Bookends
• Ruler
• 4 Foldback clips
• Eyedropper
• 2 packs of 6 (250ml) poppers
. Plate
• A pair of gloves

Toilet paper is a soft tissue paper product primarily meant to maintain personal hygiene mainly after defecation or urination. Toilet paper absorbency means when dipped in liquid or water it takes long to dissolve. In this area of investigation, four popular and common household brands of 2 ply toilet paper will put their absorbency to the test to see which is able to contain the same amount of liquid in a smaller area. Toilet paper products vary greatly in the distinguishing technical factors: sizes, weights, roughness, softness, chemical residues, "finger-breakthrough" resistance, water-absorption, etc. The larger companies have very detailed, scientific market surveys to determine which marketing sectors require/demand which of the many technical qualities. Modern toilet paper may have a light coating of aloe or lotion or wax worked into the paper to reduce roughness.

Quality is usually determined by the number of plies (stacked sheets), coarseness, and durability. Low grade institutional toilet paper is typically of the lowest grade of paper, has only one or two plies, is very coarse and sometimes contains small amounts of embedded unbleached/unpulped paper. Mid-grade two ply is somewhat textured to provide some softness and is somewhat stronger. Premium toilet paper may have lotion and wax and has two to four plies of very finely pulped paper. If it is marketed as "luxury", it may be quilted or rippled (embossed), perfumed, colored or patterned, medicated (with anti-bacterial chemicals), or treated with aloe or other perfumes.

The aim of my science investigation is to find out which brand of toilet paper is the most absorbent between four commonly used brands: Kleenex, Cotton Soft, Tork and Homebrand. Each brand used contains a roll of 2 ply toilet paper and a square of toilet paper will be used to conduct this experiment. The square of toilet paper will be clipped to the top of two bookstands to hold it up, and an eye dropper will be used to test the absorbency.

Risk Assessment:
Allergies from toilet paper If there are persisting allergies from the toilet paper used, wear a face mask to prevent contact with the dust particles or allergens.

Independent - Brand of Toilet Paper
Dependent - The water absorbency of the brand of toilet paper
Controlled - 2 ply layer of toilet paper
- Same size of droplet dropped on to the centre of the square

Validity and Reliability:
The reliability and consistensy of this experiment is ensured through practice runs of this experiment before actually recording result, consistend amount of water droplets is used after practice when it is squeezed onto the plate.

Ask, Toilet paper absorbency, 18th August 2013,
Kleenex Cottonelle, Biodegradable toilet paper, 19th August 2013
Prezi, Melvi Saji - Toilet paper Absorbency, 19th August 2013
The Onion, Soft and Absorbetn, 20th August 2013

- Kleenex: Luxury Embossing
- Tork: Premium
- Sorbent: Gentle Tissue
- Woolworths Home Brand
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