Thanks, everyone, for the replies. I went ahead and soaked it in Tide
non-chlorine bleach overnight and it all came out. *happy* !
I have another question, actually. What are the purposes for chlorine
bleach and non-chlorine bleach? Does the regular make certain clothes
yellow?
> Thanks, everyone, for the replies. I went ahead and soaked it in Tide
> non-chlorine bleach overnight and it all came out. *happy* !
>
> I have another question, actually. What are the purposes for chlorine
> bleach and non-chlorine bleach? Does the regular make certain clothes
> yellow?
Both bleaches supply oxygen. The chlorine in chlorine bleach is
supposed to end up as chlorine in salt.
Chlorine bleach can be quick, reliable, and cheap. Straight from the
bottle it has a pH of 11, which is caustic. It's especially bad for
silk, wool, and nylon, the same fabrics that don't tolerate strong
alkalines. It can dull colors and yellow fabrics. (I think in some
cases the fiber is naturally yellow and the bleach removes the
whitening.) It can weaken fabrics.
It has a limited shelf life. Last week I used bleach that had
deteriorated to the point that it took a quart to whiten a mildewed
pillow case.
Oxygen bleach uses hydrogen peroxide mixed with a washing powder such as
sodium carbonate. That way, it has a long shelf life. It's less likely
than chlorine bleach to do damage, but it's less reliable. Laundry
detergents may contain additives to help the bleach work.
Sunlight and lemon juice can bleach by removing oxygen instead of
supplying it. In time, oxygen can make the stain return.
jleiby@hotmail.com - 09 Nov 2005 05:07 GMT
So if bleach supplies oxygen and oxygen can make the stain return..
isn't that contradicting itself?
So it's okay if I use Tide non-chlorine bleach with Gain? Will that
help the shelf life?
Choreboy - 09 Nov 2005 06:56 GMT
> So if bleach supplies oxygen and oxygen can make the stain return..
> isn't that contradicting itself?
A fabric's color is in the light it reflects. If it reflects all the
light it will be bright white. If it absorbs some colors of light, the
light it reflects will have the other colors.
The part of a molecule that absorbs light is called a chromophore. A
chromophore will absorb certain wavelengths of light because of the
spacing between atoms. If you can change the chromophore it may reflect
more light and look white. Some chromophores can be changed by adding
oxygen. Others can be changed by taking it away. Some aren't affected
either way.
A stain on colored fabric is a special problem. You don't want to
change the original chromophores, and you don't want to turn the stain white.
> So it's okay if I use Tide non-chlorine bleach with Gain? Will that
> help the shelf life?
They'll have a good shelf life however you use them. You could keep a
bottle of hydrogen peroxide to pour into your wash, but its shelf life
wouldn't be long.
jleiby@hotmail.com - 09 Nov 2005 16:15 GMT
Wow that's very in depth. Makes me want to reconsider being a Science
major. :)
Thanks!
-Julie