Do any of you guys know if the "technical/commercial" grade peroxide differs from the "food grade" in the preparation of a head, or are they both the same in performance for our needs ?
Just make sure it is the % that is the same and don't get confused between % and 'vol'. 30% is 100vol H2O2 (and bloody corrosive, be very careful handling 30%, most 'shop' bought stuff is 6-9%)
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