Bonnet Cleaning with microsplitters? Where does the dirt go?

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I have been bonnet cleaning for a while now and have been using encap products to do so but I see some carpet cleaners are using powdered microsplitters to bonnet clean carpets and I am somewhat confused as to where the dirt goes using what I thought was only used for a prespray in hwe, can anyone tell me.  I understand that with encap the dirt is suspended in the polymer but don't know how  microsplitters stop dirt becoming attached to the carpet.  Can anyone explain?  Cheers

[encapman]

So far it seems that this new "buzzword" seems to be limited to a couple of janitorial lines the UK. Haven't seen it on this side of the pond yet.