why do they make liquid laundry detergent BLUE and why doesnt it stain my white shirts BLUE?

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the same applies for those of you who have purple and pink and green laundry detergents.

logical explanations only please.

and check my stats, i always select the best answer.

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  1. dirtydog says:
    June 29, 2009 at 1:12 am

    Best guess?
    There's only enough colorant
    to make the undiluted detergent appear to be whatever color
    but not enough to actually dye washed clothing
    (at least under non-laboratory conditions).

    "10. Colorants and fragrances:
    Sometimes colouring agents are added to improve the appearance and fragrances may be added for a similar reason and to make the washed clothes smell nicely."

    These colorants are different than 'optical brighteners'.

    "The detergents promising making the laundry "whiter than white" usually contain optical brighteners, acting as phosphors converting some ultraviolet radiation to blue light and optically offsetting the yellowing of the material."

    Perhaps there is a laundry chemist out here… *L*

  2. Maryn Bittner says:
    June 29, 2009 at 1:12 am

    BRobb, if the blue detergent is leaving your pale clothing blue, the problem is not in the detergent.

    Your clean clothes still have detergent in or on their fibers. Detergents are colored partly so you will know there's a problem (and for all kinds of marketing reasons).

    This can be due to incomplete rinse or to clothes packed too tightly. If you'll make sure the clothes in each load are loosely packed and move freely before the water ever reaches them, you'll probably see a vast improvement.

  3. Locke says:
    June 29, 2009 at 1:12 am

    Because it's soap. There's no die in it. If you rub it in you hands, it turns into white suds. And it doesnt go into you clothes, it takes dirt and stains out. The soap gets rinsed out.

  4. extex_cop says:
    June 29, 2009 at 1:12 am

    Actually years ago when there was only powder detergents that had a product you could get to make your whites whiter. It was actually a bluing agent…it had just enough blue in it to make the whites brighter looking. Not sure how it worked,,,but it did.

    So I'm guessing the liquids now days have that little bit of bluing agent to help brighten your whites.

  5. Emilio says:
    June 29, 2009 at 1:12 am

    * Only non staining dyes or pigments are used in detergent that will come into contact with fabric of any color (dye addition in laundry products are as low as 0.00005%).

    * If this wasn't the case then we'd be able to sue the chemical manufactures for staining our garments.

  6. mmicu1 says:
    June 29, 2009 at 1:12 am

    Hi,

    I never understood why they make colored detergents. I guess for the fun of it. I know about this company that makes wellness products and their detergent is clear and they have a good explanation for it. If interested, please email me, so I can give you m ore information about it.

    mmicu1@yahoo.com

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