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Specialty Chemistry Forums => Citizen Chemist => Topic started by: zanarota on November 20, 2020, 01:47:24 AM

Title: How to bleach with hydrogen peroxide
Post by: zanarota on November 20, 2020, 01:47:24 AM

Hi, I'm a designer, not a chemist. I am developing a new material from recycled cardboard, impregnated with latex and finished with zinc chloride. I don't know how to bleach the paper with hydrogen peroxide. Can you help me? Remember, I am not a chemist, so it would be the easiest way. Thanks.

Title: Re: How to bleach with hydrogen peroxide
Post by: zanarota on November 23, 2020, 06:31:20 PM

3% aqueous solution doesn't work.

Title: Re: How to bleach with hydrogen peroxide
Post by: pcm81 on November 26, 2020, 06:44:07 PM

Hydrogen peroxide has bleaching effect at temperatures above 60*C.
Well, it will bleech at all temperatures, but very slowly at lower temps.
https://en.wikipedia.org/wiki/Peroxide-based_bleach

You need bleach activators to use it at lower temps: https://en.wikipedia.org/wiki/Bleach_activator

Title: Re: How to bleach with hydrogen peroxide
Post by: zanarota on November 26, 2020, 09:18:59 PM

Is it necessary buffering agent? Do I need to neutralize the paper after bleaching?

Title: Re: How to bleach with hydrogen peroxide
Post by: zanarota on November 26, 2020, 09:19:33 PM

Quote from: pcm81 on November 26, 2020, 06:44:07 PM

Hydrogen peroxide has bleaching effect at temperatures above 60*C.
Well, it will bleech at all temperatures, but very slowly at lower temps.
https://en.wikipedia.org/wiki/Peroxide-based_bleach

You need bleach activators to use it at lower temps: https://en.wikipedia.org/wiki/Bleach_activator

Thanks a lot