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

2. 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)

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

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

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

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

8. 1 ﹕ Standard (obtained the least water ) 4: Watsons 2 ﹕ Adhesive Plasters 5 ﹕ Handsaplast 3 ﹕ Banitore 6 ﹕ Band Plus (obtain the most water ) ~Waterproof Experiment~

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

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

11. 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

12. 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.

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

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

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

16. 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

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

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

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

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

21. ~Pull Experiment2~ (results)

22. ~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

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

24. 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

25. 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)

26. ~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 1664.3 … 4(WORST) Handsaplast 2312 1 (BEST) Watsons 3554.3 4(WORST) Banitore 4222.6 … 2 Adhesive Plasters 5143.3 … 3 Standard 6434.3 … 4 (WORST)

27. ~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!!

28. ~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!!

29. ~Reference~

30. ~E-mail address~ ktgss_3d02@yahoo.com.hk