The hair colour strand tests don’t always give you an accurate prediction of your end result hair colour. And they don’t always take up colour like a full head of hair. Many strand tests give disappointing results which are nowhere near the results from a full hair colour application. Body temperature may make the difference. Your strand test hair also may not give a true indication of final hair shade because the strand test hair may have uneven colour saturation, especially if you’ve previously used hair dyes. Also remember that hennaed hair can look different in different light conditions so it’ll look different indoors compared to how it looks outdoors.
A Reminder about Previous use of Chemical Hair Dyes and Henna
If you’ve previously used chemical hair dyes, although you can go straight ahead and use henna / indigo, we recommend you wait as long as possible. We recommend a wait time of at least 2 weeks, especially if you’ve just permed your hair. The longer the better. This is to allow time for your hair to detox from chemical hair dye build up. The wait will also ensure you get the best hair colour uptake from henna/indigo. It’s the compound “metallic salt mix” hennas which hairdressers generally moan about and say you can’t use before or after hair dyes. Our henna and indigo are not mixed with any metallic salts. They are 100% pure henna and 100% pure indigo plant hair dyes. These are PPD free hair dyes, additive free, ammonia free, and chemical free. They are not the same stuff your hairdresser is talking about. Our henna and indigo are safe to use both before and after chemical hair dye, but we advise that you wait as long as you can before using hair dyes either side of henna.
Strand Test Hair Colour Pictures
Have a look at these photographs of natural hair colour swatches showing how they colour with henna, and how they intensify to darker shades after the indigo application. The photos don’t do justice at all to the final end result colour – scroll down to the real life photos. The henna used for these strand tests was mixed with part lemon juice and part water so the resulting henna shade is lighter than it would have been with a straight hot water mix.
Strand Test Hair Colour Picture File : Brown Hair Colours
Indigo on blonde hair or gray hair (click and scroll down the page)
Finally, if you’ve used hair dyes and especially if you’re ever bleached or permed your hair, do not use indigo for at least 6 to 8 weeks since the last dye, perm, or bleach application. Indigo over bleached, dyed, and permed hair can turn it green. In the unlikely event of green hair, apply tomato sauce or ketchup in the hair, cover the hair with plastic wrap, leave in for up to an hour and shampoo out. Repeat applications may be necessary but the tomato sauce should get rid of any green. You can also apply henna again to correct the colour.