difference between acid rinse and alkaline rinse?

Bucey

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From what i understand most commercial rinse are used with a high alkaline rinse. due inpart to the high soiling and ect. so how does that effect the pH of the carpet and will the alkalinity of the solution cause concern with browning? and is there and additional acid product added to help prevent the browning?
 

sweendogg

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Deep breath.. ok here it goes.. your alkaline rinses. aka your detergent rinses contain emulsifiers that add additional cleaning through the wand. Usually a good quality emulsifier will clean well, rinse well and no contribue to resoiling. However sum carpets are pH sensative and using an alkaline rinse will shift the natural pH of the carpet higher. As a result you can sometimes see a pH shift in color on certain nylons/commercial carpets. Usually not though.

However if you have a wool commercial carpet, a woven commercial carpet on jute foundation or a older jute backed commercial carpet you have the chance for cellulosic browning or in the case of wool, you have a fiber that likes to stay on the neutral to acid side.

An acid and the correct type of acid will leave minimal residue, and basically sour the yarn to prevent the browning much like you would add lemon juice to apples to keep them from browning in a fruit salad. Some will go so far as to say that an acid rinse on any carpet will reduce the amount of wickback on commercial carpet. This is subject to debate and specific conditions. Any other questions?
 

Bucey

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OK, that leads me to the next question of is there a need to apply a post acid treatment after, of should you just see how the thread responds. How could i determine the underlayment jute or not, if it is glued down?
 

Dolly Llama

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rstrick said:
OK, that leads me to the next question of is there a need to apply a post acid treatment after,

no...
not on everyday synthetic carpet we see on a regular basis here, anyway
it's a waste of time and juice
all you're doing is adding more gUnk to a carpet

it's a myth that ph has anything to do with re-soil problems
and some of the anti browning treatments actually ADD an offensive sticky reside ..in particular, citric acid

this ain't rocket science...vac the dry soil/dirt out, flush as much of your pre-spray out as practical and don't leave the carpet soaked..
you'll have very few to no issues with anything on "normal everyday wall to wall" goods
(even the occasional 20+ year old jute backed nylon you'll encounter from time to time)


..L.T.A.
 

sweendogg

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Meat hit it pretty well too. Use common sence. If you are suspect of wool fibers.. do a fiber ID. And Jute backing has not really been used in 20 years.. So unless its really really really old, you are most of the times going to be cleaning synethitic backed carpet.
 

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