Bleach: Chlorine and Pure White Newspaper
PPT1
Good morning, everyone.
Today I am going to talk about bleaching in lives.
PPT 2
Here is what we are going to talk about in the next 5 minutes.
How do manufacturers bleach something into light colors?
How do things in white are easily to get yellow?
Why do they do so?
The reason of getting yellow.
The solution to the problem.
Difference between sulfide bleach and chlorine bleach.
PPT 3
We heard words such as “bleach for unbleachables” from TV commercials. But what exactly is bleaching? Does it mean making things turn into a lighter color or does it mean making thing become purely white? According to Wikipedia, bleaching is defined as “a solid or liquid chemical used to whiten or remove the natural color of fibers, yarns, paper, and textile fabrics”. There are many kinds of bleaches in the market contains different kinds of chemicals such as S and Cl, and they’re the two elements I am going to focus on introducing today. PPT 4
Firstly, it comes to sulfide bleach. The compound which is actually making the process is SO2, the oxide of S element. SO2 is a colorless, irritating-smell and toxic gas under S.T.P. and is released by volcanoes and in various industrial processes. Have you guys ever had the chance of being close to a volcano? I went to a geothermal park in New Zealand and once I came into the gate of the park, my nose is filled with the smell of sulfur, like the smell of rancid eggs.
PPT 5
Here is a question. Have you ever noticed that the old things, such as pure white newspaper gradually become off-white? Or the stylish straw hat you got at last year become a little bit yellow which made it no longer good-looking? Some of the girls goes to manicure, but why does the white nail polish on your nails become less shiny?
PPT 6
What these phenomena have in common is that the objects are all white. Why do white things easily getting yellow?
White is an all-match color, so everybody likes it. However, things in
Good morning, everyone.
Today I am going to talk about bleaching in lives.
PPT 2
Here is what we are going to talk about in the next 5 minutes.
How do manufacturers bleach something into light colors?
How do things in white are easily to get yellow?
Why do they do so?
The reason of getting yellow.
The solution to the problem.
Difference between sulfide bleach and chlorine bleach.
PPT 3
We heard words such as “bleach for unbleachables” from TV commercials. But what exactly is bleaching? Does it mean making things turn into a lighter color or does it mean making thing become purely white? According to Wikipedia, bleaching is defined as “a solid or liquid chemical used to whiten or remove the natural color of fibers, yarns, paper, and textile fabrics”. There are many kinds of bleaches in the market contains different kinds of chemicals such as S and Cl, and they’re the two elements I am going to focus on introducing today. PPT 4
Firstly, it comes to sulfide bleach. The compound which is actually making the process is SO2, the oxide of S element. SO2 is a colorless, irritating-smell and toxic gas under S.T.P. and is released by volcanoes and in various industrial processes. Have you guys ever had the chance of being close to a volcano? I went to a geothermal park in New Zealand and once I came into the gate of the park, my nose is filled with the smell of sulfur, like the smell of rancid eggs.
PPT 5
Here is a question. Have you ever noticed that the old things, such as pure white newspaper gradually become off-white? Or the stylish straw hat you got at last year become a little bit yellow which made it no longer good-looking? Some of the girls goes to manicure, but why does the white nail polish on your nails become less shiny?
PPT 6
What these phenomena have in common is that the objects are all white. Why do white things easily getting yellow?
White is an all-match color, so everybody likes it. However, things in