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Heres our Biology book, having a small coating which dosent repel water that much and allows some gel pen using. The purpose is to prevent the paper to yellow.
Heres the section i am going to use to show what i mean.
Added water onto the paper to show it adsorbs and is going to be easily torn.
The drop of water due to the small layer of coating.
Wipe off the excess.
A small mark is left behind. This is less than the normal non-coated paper as the coating somehow prevents the water from getting adsorbed. It also prevents oxygen from being adsorbed by the paper to turn yellow. This is due to Lignin. Lignin is in trees and turns yellow over time when exposed to oxygen.
This is another problem.
When using gel pen on the coating, it dosent get adsorbed as quickly and results in this.
Smudging.
Saturday, September 16, 2006
Heres our Biology book, having a small coating which dosent repel water that much and allows some gel pen using. The purpose is to prevent the paper to yellow.
Heres the section i am going to use to show what i mean.
Added water onto the paper to show it adsorbs and is going to be easily torn.
The drop of water due to the small layer of coating.
Wipe off the excess.
A small mark is left behind. This is less than the normal non-coated paper as the coating somehow prevents the water from getting adsorbed. It also prevents oxygen from being adsorbed by the paper to turn yellow. This is due to Lignin. Lignin is in trees and turns yellow over time when exposed to oxygen.
This is another problem.
When using gel pen on the coating, it dosent get adsorbed as quickly and results in this.
Smudging.
imprinted his world on;
7:28 PM
Summery
Phua Han Siang (PHS)
Lim Jia Qing (LJQ) Li XuanJi (LXJ)
M06101
NUS High School
Material:Paper
Problems:Turns yellow, Tears when soaked and Coating dosent allow gel pen
Ideas proposed:Using new chemical which bonds with ink but repels water and oxygen
Phua Han Siang (PHS)
Lim Jia Qing (LJQ) Li XuanJi (LXJ)
M06101
NUS High School
Material:Paper
Problems:Turns yellow, Tears when soaked and Coating dosent allow gel pen
Ideas proposed:Using new chemical which bonds with ink but repels water and oxygen
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Heres our Biology book, having a small coating which dosent repel water that much and allows some gel pen using. The purpose is to prevent the paper to yellow.
Heres the section i am going to use to show what i mean.
Added water onto the paper to show it adsorbs and is going to be easily torn.
The drop of water due to the small layer of coating.
Wipe off the excess.
A small mark is left behind. This is less than the normal non-coated paper as the coating somehow prevents the water from getting adsorbed. It also prevents oxygen from being adsorbed by the paper to turn yellow. This is due to Lignin. Lignin is in trees and turns yellow over time when exposed to oxygen.
This is another problem.
When using gel pen on the coating, it dosent get adsorbed as quickly and results in this.
Smudging.
Saturday, September 16, 2006
Heres our Biology book, having a small coating which dosent repel water that much and allows some gel pen using. The purpose is to prevent the paper to yellow.
Heres the section i am going to use to show what i mean.
Added water onto the paper to show it adsorbs and is going to be easily torn.
The drop of water due to the small layer of coating.
Wipe off the excess.
A small mark is left behind. This is less than the normal non-coated paper as the coating somehow prevents the water from getting adsorbed. It also prevents oxygen from being adsorbed by the paper to turn yellow. This is due to Lignin. Lignin is in trees and turns yellow over time when exposed to oxygen.
This is another problem.
When using gel pen on the coating, it dosent get adsorbed as quickly and results in this.
Smudging.
imprinted his world on;
7:28 PM