[gwrightson]

Had a call from my brother yesterday, he had a new house built and moved in about 8 months ago, quality 100% wool carpet throught most rooms, but one of the spare bedrooms which he has never got round to furnishing yet was used basicly as a room for all the junk some people seem to have, any way he decided to get it furnished so moved every thing out, on moving some black bin liners full of different things he noticed they had stained the carpet, any way sure enough 4 large patches of an orange coloured staining on an off white carpet, oh dear was my initial reaction, didnt like the look of it at all so went through the options with him.

First, a simple extraction, nothing ,  then i tried numerous tests with different spotters the only one were i got some removal was pog, this got me thinking ! Would the bin liners contain some thing like an oil product in its production? as this was the only thing that i could imagine had transferred over the period of a few months, he does have underfloor heating, i wonder if this has caused the problem!!!

Has any body come across this before?  any way i didnt fancy having to go over the areas with pog due to the amounts so suggested sod.met   .
Perfect, instant results  and one happy brother.
Geoff

[Aquakleen Restoration Services]

http://www.youtube.com/watch?v=hGPKuclsJ9o

[John Kelly]

Geoff, this is called BHT yellowing. I have just done an insurance report for the very same thing. That lovely smell you have when you get new carpets fitted is actually chemicals off gassing
They off gas from the glues and materials in the carpet and also the underlay. When the carpet is uncovered there is no problem as the chemicals just dissipate into the air. However when things such as furniture or the bags you mentioned prevent that happening then the gasses are trapped in the pile causing the discolouration you describe. In this situation you may also have a reverse affect with gassing from the plastic bags doing the same thing.

[Peter Sweeney]

Blimey John

And you think you need a certificate

Is there anything you don't  know   

Pete

[gwrightson]

Thanks John,

I knew it was that all along

seriously i had a feeling it was something like you have mentioned , it has been discussed on here before , but i could not remember what they called it, will try and remember for future refrence.

can you reccomend a solution ? with out resorting to sodmet.

geoff

[colin fitch]

Geoff,

You need citric or sulfamic acid [both of which can be found in a lot of browning perscriptions]

Sodium metabisulfite worked well because it is also an acid[ and is also used to correct brownig]

Colin Fitch

[Paul Redden Countryfresh]

Just wondered bin liners do give off a pungent tar like odour. I'm sure POG would not move BHT
discolouration. Totally agree with the BHT theory tho but worth a try with solvents if it's a write off.

Why don't carpets manufacturers warn about this BHT off gassing?

Paul