[CLiCS4U]

Thanks so much for the reply Bill!
I found this informative article on The Journal of Cosmetic Science’s website and it isn’t just testing hair color, it’s a paper on also testing a patented color lock ingredient Polyquarternium 55.
They tested the hair color extensively to be able to make the claim of the color lock. It’s insightful because it gives me more details and procedure than I had previously known. And, it clears up the discussion on whether or not we need color analysis equipment. We do   
Do you have any equipment that you can recommend for testing purposes? I have been looking at some of the newer technology for spectrophotometers and it looks like you can get good equipment for $2-3K, does this sound right?

Here is the article:
http://journal.scconline.org//pdf/cc2009/cc060n02/p00217-p00238.pdf

Thanks!

[CLiCS4U]

They are oxidative dyes. Crème haircolor.
We are developing 7 base shades and 15 pure tone shades. Our chemist is creating the 22 components of the line and I will mix and match to create the shades.
I’m wondering about the water test, the leave it in the sun test, the apply, then wash/rinse-reapply test, etc. I haven’t done that kind of testing so I’m trying to get as much info as I can to gauge our time to market as best I can.
In your experience, should we be looking at the 6-9 mo. window he set, but assume it will be closer to 9mos. instead of 6?
Thanks for the reply Bill.

[CLiCS4U]

Hi there…Chemicalmatt,

Yes, I am skeptical too, but the hairdresser community swears by this product. To me, I think it can be helpful when bleaching or lightening the hair because it acts as a buffer leaving the hair in better condition. With that said, they say to increase the peroxide strength when using this in the mixture which does in fact indicate a certain degree of dilution and/or effectiveness of the bleach.

I think you may be on to something by stating that the bigger molecule will actually inhibit dye uptake, that will cause increased fading in darker hair colors. However, they are selling it like crazy.

I’m working with a chemist that says you can use other ingredients to achieve similar results that does not take any additional time to process, Thoughts?

[CLiCS4U]

great article. Thanks!