Thank you Mike for your answer,
If a carpet is such poor condition as described with copius amounts of black top or soil saturation then almost certainly apart from the soiling from grease and fats and foot fall, it would have been cleaned previously using a hgh ph which has left oodles of residue in the carpet attracting further soiling resulting in the same problem again,
Your right this is now a restoration job but has Mr Owner been told this or is just another job on a bog standard restaurant carpet who's manager not bothered about the results so who cares about standards.
Go in with this attitude and I can assure you you may get away with it a few times but sooner or later that carpet will shrink or the colours will bleed and now you own it.It may not be down to you not knowing what you are doing but the previous cleaners.Thats why I would be worried about shrinkage and colour bleed using the methods described above.
Contract Wilton or Axminster a very very good carpets that will take a beating and a good many sub standard cleans but eventually with the ph raised to such a level that you have now reached the tipping point eventually somthing will give and it might be the time you have taken on the job and you will end up paying for all previous cleans that have been carried out on it.
By all means Blitz it, that Axminster will look lovely in your lounge
willo if it didn't work for you fine, there are lots of solutions that we have used that I either don't rate or just can't get on with. Your description of it was very succint.
There is no
need to use high enzyme and high ph on black top whether be sugar based or protien based as I have already mentioned we can and do clean without the need. You just might prefer to because thats what you been told and are used to.