1. PROBLEM NO.6
REVIEWER
Team China Taking the stage: Zheng Luxiao

2. Problem
Suggest a chemical formulation for the ink that would disappear after used to write a text. What parameters determine the time when the text becomes invisible? Is it possible to process the paper in such a manner that the text appears again?

3. Reporter’s expression
pros
cons
Clear Structure
Logical expression
Quite fluent
Clear experiment phenomena in forms of pictures
Great teamwork!
Failed to give complete answer to question

4. Reporter’s theory advantages disadvantages Qualitative analysis
Reasonable simplification: focus on a few way to make “disappearing ink”
Focuses on a few parameters
Lack of quantitative analysis
Missing some essential chemical formulas

5. Reporter’s experiments
pros
cons
Reasonable experiment settings
Good presentation of experimental procedure

6. opponent’s expression
advantages
disadvantages
Organized expression
Clear logic of raising questions
Courteous demeanor

7. Opponent’s Overall Performance
pros
cons
Grasped the essential issue
Have a profound understanding on certain parameters
Proper structure of the report

8. reviewer’s suggestion
To the reporter: Complete solving the problem. Do some quantitative research.

9. THANKS FOR YOUR ATTENTION