Until there exists a practical method for determining both quantitative and qualitative soil removal, the debate remains largely subjective. And this is to the advantage of marketing all but the "best" method available.
Yes, ATP results are overblown by method marketeers, because it is but one indicator of many that describe the multiple goals of the cleaning process, but not any specific demonstrable level of removal.
To "kill" the vestiges of biomass present in carpet soiling is not any defacto indicator of "clean". Just because it tests negative for bioactivity, it does not follow that ANYTHING, or any particular relative percentage of soil has been removed.
Visual appearance has flaws, as just because you can't see the soil, it also does not follow that it has been removed in any specific percentage. Some have suggested weight comparisons to measure relative soil removal. The flaw in this is that cleaning processes invariably actually remove quite a bit of substrate (physical fuzzing, breakage of fibers that are subsequently removed by extraction or post vacuuming, chemicals that attack substrate, etc).
C. Lee, still waiting for the first post of yours with ANYTHING to offer of value, what a waste of time.
What protocol are you testing under. Last time I asked you directed me to your online get together. Can't you lay them out so others can get perform like testing.especially when he doesn't even seem to understand the protocols of the test itself.
That's the same for hard surfaces. I'm surprised their isn't something more specific for soft good like carpet
...you are still letting them see improvements due to cleaning....
cleaning - The purposeful activity of removing soil and undesired substances from an environment or surface to reduce damage or harm to human health or valuable materials. Cleaning is the process of locating, identifying, containing, removing and properly disposing of unwanted substances from an environment or material.
Levels of Cleaning include:
- Preventative maintenance;
- Appearance/interim cleaning, and
- Restorative cleaning.
The CRI (carpet mill association) does scientific testing through Professional Testing Laboratory (PTL). The highly respected textile scientist Dr. Steven Spivak has checked PTL methodology and pronounced it sound. CRI/PTL have taken their lumps over the Rug Doctor ratings and are currently revising their program to take cleaning efficiency into account, so you'll never see a do-it-yourself portable rated with truckmounts again. The testing is honest and scientifically repeatable, they just didn't account for the amount of time it took to get equal-to-truckmount soil removal from a portable.I'm not aware of any real and valued testing (other than Tony Wheelwright's boy scout weight's and measure pocket pal) that has the ability to take two identically soiled chunks of carpet and tell you which one weights less after cleaning. Can't trust the carpet mills to recommend a process, can trust the associations/foundations or anybody else (john included) to be honest about it