You know that Just For Men commercial? Where the woman offers some of her hair dye to the guy but the guy is convinced by the voiceover to use manly dye instead? The claim is that it only takes 5 minutes to use JFM instead of however long (can’t remember if they say in the commercial) to dye the woman’s. If the 5 minute time is true, why is there a difference in the time it takes?
It seems the main difference is that Just For Men is not intended to be an all over change of color. It is targeted to only remove the gray and according to their website does not affect the non-gray hair.
Just for men is a color adding dye only. You can never go lighter or a different color like brown to blond. Many women’s dyes, strip out the color first, which takes about 30 minutes, then they dye.
Er, no? Two out of the three types explained here only add color to the hair, they don’t strip color.
I don’t get what your protesting. The womens coloring I was talking about is the stuff that takes a long time. Do any of the ones that take a long time to use, not remove the color?
It isn’t many of the women’s hair dyes that strip the color from the hair first. The demi-permanent can take, 20 mins or more if I am recalling correctly. They don’t strip the color out, they add to the color, and slightly enhance what is already there. A lot of hair dye doesn’t involve bleaching, it just involves adding pigment. When I was younger, and experimenting I dyed my hair, and I chose this kind because it is less damaging, and would take less time for my hair to be restored to normalcy, compared to going blond, from dark brunette.
The only ones that remove the color from the hair are two-step processes that bleach first. Regular women’s hair color, that you’d do yourself, just changes your hair color; it doesn’t strip the natural color out. Most of them do take a long time, though, but Just for Men and similar products are color restorers more than dyes, exactly.
Most hair dyes, including “Just for Men,” are two-part formulations that include a peroxide-based “color developer.” This leads me to believe that some lightening is taking place. If you’re just dyeing grey hair, this lightening is probably minimal, as is the amount of actual darkening/dyeing, so I’m not surprised that the application takes less time than the less subtle change sought by many women who dye their hair.
Ok. I thought the long time ones where only the ones that strip the color first.
And what about the colour choices?
Men’s hair dye, about 3 colours. Women’s hair dye, like a zillion! Huh?
Because the stuff marketed to men is sold as a way to cover up grey hairs, and only to cover up grey hairs. While the stuff marketed to women is sold as a way to cover up grey hairs PLUS enhance your natural color, OR to give yourself a whole new hair color! Whee!
If none of the men’s colors appeal, you can just use the women’s stuff. Trust me. It doesn’t contain anything that would harm your manliness.
Right. Plus, show me a guy who can articulate the difference between “very light ashy blonde” and “dark platinum blonde”, and I’ll show you a guy who’s using Nice & Easy already! Most of the color spectrum of women’s hair dye verges on the scammy - once you consider that they’re (mostly) deposit only haircolors anyway, and the color of your own hair influences the final color far more than whether you’re using 124 or 124A.
Just for Men is just hair dye. Nothing special about it. It’s quicker to apply because men, on average, have a lot less hair, and it’s quicker to develop because, again on average, men are only dying recent outgrowth, which sucks up color a lot faster than the damaged cuticles of long, old hair. My roots are done in about 5 minutes - it’s the length that takes forever to cover and to develop.
ETA: Oh, and the stuff about “just targets the gray”? Bullshit. There are no nanobots running a chromographic analysis of each hair shaft. Grays are actually more resistant to taking color than regular hair. It colors all the hairs, same as any hair dye, but since you’re matching the color to your existing color, you’re not supposed to notice you’ve “dyed” your hair the same color it was when you started.
Witness the Ronald Regan “Just For Men” look for an example of what WhyNot is talking about.
Hah! I use Loreal Preference Hicolor! (It works great for lifting dark hair)
Oh crap, I think I still prove your point.
Darling, if you can properly use “lifting” in a sentence to refer to haircolor, you’re in a whole 'nother ballpark. Turn in your Guy Card[sup]TM[/sup] at the door, please. 
I was never issued a Guy Card, the doctor slapped a rainbow sticker on my ass the day I was born and my Fabulous Card arrived in the mail 6-8 weeks later.