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Michel Roberts

  • Posts: 226
Re: how to prevent browning????
« Reply #20 on: February 09, 2005, 09:04:19 pm »
Forgot to ask what is the Ph of no2 for synthetic carpet

Michel

Re: how to prevent browning????
« Reply #21 on: February 09, 2005, 09:06:56 pm »
Michel

high 10.9-11.1Ph

Best regards Nick

*paul_moss

  • Posts: 2961
Re: how to prevent browning????
« Reply #22 on: February 09, 2005, 09:16:24 pm »
Nick :)
Far too much info :D

All I was looking for was. :P

PH stands for The Power of Hydrogen. ;)

Paul
Paul Moss  MBICSc
www.mosscleaning.co.uk
REMOVED FOR POSTING OFFENSIVE MATERIAL

Re: how to prevent browning????
« Reply #23 on: February 09, 2005, 09:18:51 pm »
Hi Pual

you mean

per Hydrion

Best regards Nick

*paul_moss

  • Posts: 2961
Re: how to prevent browning????
« Reply #24 on: February 09, 2005, 09:20:00 pm »
 ;D ;D

Paul
Paul Moss  MBICSc
www.mosscleaning.co.uk
REMOVED FOR POSTING OFFENSIVE MATERIAL

Dave_Lee

  • Posts: 1728
Re: how to prevent browning????
« Reply #25 on: February 09, 2005, 11:32:28 pm »
Hi Nick,
I always understood pH meant 'percentage Hydrogen', so this is incorrect or does it equate to per Hydrion, or is it just a simplified way of explanation?

Dave.
Dave Lee, Owner of Deepclean Services
Chorley Lancs. Est 1980.
"Pay Cheap -You get Cheap - Pay a little more and get something Better."

Michel Roberts

  • Posts: 226
Re: how to prevent browning????
« Reply #26 on: February 09, 2005, 11:42:46 pm »
Thanks Nick

Does no2HD also return to netural on drying


Michel

Ian Gourlay

  • Posts: 5746
Re: how to prevent browning????
« Reply #27 on: February 10, 2005, 12:26:01 am »
Does it matter what ph stands for My sons the Phd not me ;D ;D

Its late Im going to bed

Doug Holloway

  • Posts: 3917
Re: how to prevent browning????
« Reply #28 on: February 10, 2005, 08:11:16 am »
Nick,

Where did you get that explanation from ;)

The simplish defintion of pH is potential hydrogen ,i.e the hydrogen ion concentration .

A logarithmic scale means , simply that PH6 is ten times Ph7,and pH 5 is ten times pH6.

In practice this means that a solution of pH 11 is 100 times more alkaline than pH 9 and 10000 times more than pH 7.

Cheers,

Doug


Re: how to prevent browning????
« Reply #29 on: February 10, 2005, 08:46:43 am »
Michel

Yes it does

Dave, this is the per translation,

Doug, Idecided to give the full version, not the simple one

Best regards Nick

woodman

  • Posts: 1069
Re: how to prevent browning???? New
« Reply #30 on: February 10, 2005, 10:17:21 am »
come on Nick,

you were just being smart arse weren't you ;D

pH = potential/possibility of Hydrogen

99.9% of us are carpet cleaners and not chemists or scientists and only need to understand the basics of pH. well thats my excuse any way ;)

The manufacturers have done all the work for you with regard to dilution rates,dwell times, etc.

So unless you carry a lab around with you in the back of your van, you should not be altering mixing ratios already tried and tested by the manufacturers in your cleaning process.If you do and come unstuck as a result ie browning then its your responsibility.

As for acid rinses, a lot of cleaners carry this out as a matter of course and most times it is simply not required indeed if you do and it's not required you could do what you were trying not to do which is push the carpet out of its safe pH range.

It must be remembered that most carpets are not manufactured at pH neutral 7 but will be around the pH 4 mark for example with the dyes stable up to pH7- 8.If this carpet is then cleaned using a product with a pH of 9 then pH of the carpet will rise from 4 to around 5.5-6 so its still safe.Had the carpet been 7 to start with then  the alkaline would rise to 8.5 - 9 and you could now be in trouble as its out of its safe range.Add to that the possibilty that the carpet may have been cleaned in the past and the pH may already be at 8 as the last cleaner had used an alkaline product of 9.He got away with it and left it in its safe range but now you come along and clean again at pH 9.The carpet is now at pH 9-10, your in trouble with out even realising it.

You must also of course make sure you know when using alkaline products if they are buffered or not.

If you have the above information you would then know when to use a sour rinse or not.For example if you don't know if the carpet had been previously cleaned then it might be a good idea to protect yourself and carry it out( if you haven't already carried out a pH test that is which of course we all know we should if no information is to hand ;))


Re: how to prevent browning????
« Reply #31 on: February 10, 2005, 01:23:05 pm »
I don't know, you answer a question and !!!

I wouldn't say smart arse,

Obviously interpretation of this subject is relative to the the individual, and what they need the information for.

I don't carry a lab, but would suggest I now have more than a basic understanding of the subject, I have added to my own knowledge by accessing the internet, reading up on te subject and talking to the likes of JB, and others, now having a large involvment in the production on cleaning chemicals, my general knowledge of the subject increases every day.

My personal opinion, of Ph within carpet cleaning is that it is only a small part of the chemistry knowledge require to be a professional in this industry.

To succesfully clean a carpet correctly adequate knowedge is required.

Best regards Nick