What you use John,where you get them?how much you charge 
America
search any of the sites Cobb , Donjon , Steembrite for ' Dye ' and you will see heaps to choose from , as they do whole room dying also they have large tubs of dye . I got some 1LB pots .
If you just want to do the odd spot then perhaps best to buy the kit mentioned in posts above , its shown in the Tacca video , posted recently also . A small amount of dye goes a long way so you dont need a lot really . But the big jars a re good value .
I have this large modern hotel with this brown carpet on all the bedrooms and bedroom corridors . During the bust when hotels changed hands for a euro ,it was staffed by cheap inexperienced workers who spilled bleach , kettle descaller everywhere , there are hundreds of spots .
I was just testing today , firstly i tried adding the three primary colors to make the desired shade of brown , that worked but if found just using Brown and giving it a rub with a towel after to blend it worked OK .
Im kinda doing a diy version in my prep so firstly i used Haitian cotton cleaner ( cause it had it handy ) to neutralize and ' clean' the bleach spot , then i mixed a bit of citric acid with the dye and hot water .
Price , i will probably give an hourly rate , i would be there for days :v
Domestic , i wouldn't know what to charge , don't think id get the 120 per stain mentioned above in these parts !
