December 01, 2021, 11:28:17 PM
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Topic: what is color fading in clothes  (Read 1973 times)

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Offline shvcko99

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what is color fading in clothes
« on: August 19, 2021, 11:40:46 AM »
I don't know if it's the right sub-forum but I think it's close.
I'd like to know what is the actual chemical reaction of color fading of clothes under sunlight from initial reactants and the final products. I'd also like to know
where the final products usually go? Do they stay in clothes or leave into the air and if they are bad if inhaled

Offline Corribus

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Re: what is color fading in clothes
« Reply #1 on: August 19, 2021, 11:49:10 AM »
The chromophores generally are still in your clothes, just chemically modified in a way that changes their visible light absorption and reflection properties. There is not one chemical reaction that you can point to, but it is generally the same as what happens when you bleach clothes... except that sunlight is the driver of chemistry. You might do some research on the topic of photobleaching.
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

Offline shvcko99

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Re: what is color fading in clothes
« Reply #2 on: August 19, 2021, 01:50:39 PM »
The chromophores generally are still in your clothes, just chemically modified in a way that changes their visible light absorption and reflection properties. There is not one chemical reaction that you can point to, but it is generally the same as what happens when you bleach clothes... except that sunlight is the driver of chemistry. You might do some research on the topic of photobleaching.

What are usually the products of the reaction? Do they stay in the clothes or leave into the air

Offline Corribus

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Re: what is color fading in clothes
« Reply #3 on: August 19, 2021, 01:59:44 PM »
Oxidized products, can't really be more specific than that. Photochemistry is complicated.
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

Offline shvcko99

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Re: what is color fading in clothes
« Reply #4 on: August 19, 2021, 08:18:31 PM »
Oxidized products, can't really be more specific than that. Photochemistry is complicated.
are the oxidized products usually soluble in the clothes or go away as gaseous form to the air

Offline wildfyr

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Re: what is color fading in clothes
« Reply #5 on: August 21, 2021, 07:49:41 AM »
Usually they stay in the clothes, but are simply less colored than the starting dye or pigment.

Offline shvcko99

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Re: what is color fading in clothes
« Reply #6 on: September 25, 2021, 02:41:36 PM »
Usually they stay in the clothes, but are simply less colored than the starting dye or pigment.

Is there any general chemical equation of the bleaching of dye by sunlight?

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