Henry... http://www.adfhair.com provides colour/conditioner combined, which is recommended by Toplace for using on system hair and the product is called ``Back2natural``--the colour you want is `Dark natural ash brown` ......now, I just tried to access the site and my browser is warning me not to proceed today as the site has been compromised by Hackers and may contain malware...the site owner has been informed .....the advice from the browser is to wait until tomorrow before accessing it...so just be aware of that ...... but there are other sites selling the product too so if you just do a Google -search for ``Back2natural``-- you should find it....
.... I find it very good and not a bit `harsh`obviously, but when the system is really getting on in age, the `normal` colouring products are more effective in my experience, but probably Harsh on the hair... I like my hair to be quite dark/almost black, so as time goes on [due to oxidation etc.] you need to leave colouring products on/in for longer to achieve the desired hue. Paul.