Project-Learning Under which situation do we use which brand of plaster??

Member list  Teacher Adviser : Tam Wing Ching  Leader : Chong Maan Yu (4)  Member : Chang Lok Yu (2) Chow Suk Shan (5) Ho Chung Yan (7) Hui Po Yan (8) Leung Chui Shan (11)

Introduction:  Usage of plasters : related to our daily life. allow the wound to breathe and help the natural healing process.

Factors to be considered when doing the experiments  Absorbency  Ventilation  Force degree  Waterproof  Viscosity

~Waterproof Experiment~ Aim  test the cotton if it could prevent the incoming water. 1.Formed the two groups

~Waterproof Experiment~ Put on tomato, then filled up with water. Results:

1 ﹕ Standard (obtained the least water ) 4: Watsons 2 ﹕ Adhesive Plasters 5 ﹕ Handsaplast 3 ﹕ Banitore 6 ﹕ Band Plus (obtain the most water ) ~Waterproof Experiment~

~~Viscosity Experiment~~ Aim  test which plaster could absorb the largest amount of dust

~~Viscosity Experiment~~ put the plasters on some wooden stickers and placed them near the windows.

Viscosity Experiment ( failed ) First experiment:  our classroom was so clean, we couldn't found a lot of dust Second experiment:  there was too a lot of dust, we couldn't find different between the plasters

Absorbency Experiment Aim:  test the cotton ’ s absorbency. Why?  one of the important features  Gentian violet solution is easy to show the results clearly. Steps:  drop drib of gentian violet solution to the each plasters ’ absorbent cotton.  Wait for 2 minutes  put one paper cover the plasters and one paper at the bottom to absorb the extra solution.

~Absorbency Experiment~ plasterCover paper contains solution cannot absorb the solution completely

Absorbency Experiment  cover paper (at the bottom) Plaster has solution can absorb all of the solution but it overloads.

~Absorbency Experiment~ Results:  1: Adhesive Plasters.  2: Banitore Protective Plaster  3: Hansaplast  4: Standard Bandage  5: Watsons Plasters  6: Band Plus

Pull Experiment  used spring scale instead of by hand ( more accurate and easier to measure.) Affording weight higher ---tensility is better  put a clip at one side of each plaster

Pull Experiment  the other side was connected to a spring scale pulled the plaster violently

*=The easiest to pull. ******=The stickiest. #= the worst (the most change in appearance.) ######=The best. (Just small change in appearance) Pull Experiment (Results)

Pull experiment (failed)  Use different afford power (Newton) unfair (a big mistake)

~Pull Experiment2~ (Forced Degree)  set the weight, 25N  pull the plasters with this weight

~Pull Experiment2~ (results)

~Pull Experiment2~ results Plasters 1.Standard#### 2.Watsons## 3.Hansaplaste###### 4.Band Plus# 5.Adhesive### 6.Banitore##### #= the worst (the most change in appearance.) ######= the best (just small change in appearance) Hansaplast maintains the first position in both experiments

Ventilation Experiment Aim:  test the plasters’ ventilation Why?  it will affect the wound to breathe or the healing.

Ventilation Experiment Steps:  1. drop 2ml alcohol into each test tube  2. cover the test tubes with the different plasters ’ cotton.  3. put all the test tubes near window *alcohol ’ s volatility is better than the others

Ventilation Experiment (failed)  not enough time  dangerous (by heating )  didn't have other methods. *Failed the 2 nd time --due to atypical pneumonia  (use water to do the second experiment)

~Conclusion~ If the number is small, it has the best performance in this category. --- failed two experiments (viscosity and ventilation). Order: Name Waterproof AbsorbencyPullAverage Place in a competition Band Plus … 4(WORST) Handsaplast (BEST) Watsons (WORST) Banitore … 2 Adhesive Plasters … 3 Standard … 4 (WORST)

~Conclusion~ Arrangement  1: Handsaplast  2: Banitore  3: Adhesive Plaster  4: Standard : Watsons : Band Plus Mistakes: failed three experiments  -no enough time --environmental errors ---our mistakes (couldn ’ t concentrate the problems to solve) We are so sorry that we could not give you the exact answers!!

~Conclusion~ Advice:  Standard & Adhesive Plasters for fingers (contacted with water-- -good at waterproof )  Adhesive Plasters for wound is quite large and outpour blood (absorb blood rapidly.) We hope these advise will be useful for you!!

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