Thank you for commenting here Fred.
Your two articles stimulated questions that I believe need to be asked about what is called "the encapsulation cleaning method".
First, let me make this clear to you, and everyone:
I am very happy that this method exists, and its obvious that it "works", in that we are seeing visible appearance improvement and less resoiling and wicking problems when the method appears to be used properly. There is no doubt that these are very important benefits.
But.....
In my search for answers regarding testing done on how the process, and the products used in the process, work, I was disappointed to find there has been little such testing done.
The reason I have such strong concerns about this cleaning method is this:
1. As a whole, too many cleaners using this method are inadequately performing the dry soil removal step before the application of their encapsulant product. In some cases, they are relying on in house maintenance staff or a janitorial contractor to perform this service. We only need to see how such people clean carpet when that responsibility is left to them to understand the potential problems involved with this practice.
2. There seems to be little truly understood about how the products that are used actually work. I listen to, or watch, debates between the use of "crystal formers" and "film formers", and while undiluted product tests seem to show important differences, many (not just me) are not convinced these tests reflect what is happening when these products are used in a ready to use form, agitated, then "extracted" from soiled carpet.
3. The "extraction step" troubles me. In this case, most cleaners are relying on a janitorial contractor, or worse yet, in house maintenance staff, to perform the extraction step by leaving them responsible for vacuuming the loosened soil and dried encapsulation product residues. At best, this important part of the process is out of the control of the cleaner. At worst, its being performed by individuals who may be poorly equipped, poorly trained, or poorly motivated to do the job right....or all three. There also are two types of extraction being discussed: One is the vacuuming of the soil and residues after drying, the other is using an absorbent pad to remove moisture, loosened soil, and residues. There is no testing of each type of extraction process that I'm aware of.
Fred, please do not think I am unduly criticising your efforts to find answers. I appreciate that you are willing to do so, and that you are doing so as an independent and respected expert in this field.
Your articles stimulated important questions, and I hope that because of the importance that this method has had for our industry that those answers can be found.
Any keen industry insight you have given me credit for does not mean I have those answers.
Only more questions.