The Very Low Moisture (VLM) cleaning method is designed primarily for soil encapsulation and removal with minimal water use, rather than soil extraction through traditional wet cleaning methods. Here's how it generally works:
### VLM Cleaning Process:
1.
Soil Encapsulation: In VLM cleaning, specially formulated chemicals are used that encapsulate or "crystalize" the soil particles once they dry. These chemicals are applied to the carpet and require minimal moisture.
2.
Mechanical Agitation: A crucial step in VLM is the mechanical agitation using machines like
CRB (Counter-Rotating Brush) systems, oscillating pads, or other appropriate equipment. This agitation helps distribute the encapsulating chemicals evenly and ensures contact with soil particles.
3.
Drying and Vacuuming: After the application and proper agitation, the encapsulant dries quickly, usually within one to two hours. As it dries, it forms a crystal structure that encapsulates the soil particles, making them easy to vacuum away.
### Soil Suspension vs. Extraction:
-
Soil Suspension: In traditional hot water extraction cleaning, water and detergents are used to suspend soils and stains in the solution, which is then extracted from the carpet through powerful suction. This method relies on significant amounts of moisture to effectively remove the suspended soil from the carpet.
-
Soil Encapsulation in VLM: VLM does not typically suspend soil in the same way. Instead, it works by binding the soil to a substance that can be mechanically removed. After drying, the encapsulated soil particles are vacuumed up as part of regular maintenance. This procedure removes the soil without the need for extensive moisture.
### Effectiveness of VLM:
-
Suitability: VLM is highly effective for maintenance cleaning in environments where minimal disruption is essential, such as busy commercial settings or areas that need to stay operational. It is less suitable for heavily soiled carpets that may require restorative cleaning methods.
-
Limitations: While VLM is excellent for removing light to moderate soil loads, it may not be sufficient for deep cleaning or removing heavy stains and soils embedded deep within the carpet fibers. For such cases, periodic cleaning with hot water extraction might be necessary to thoroughly clean the carpet.
In conclusion, VLM effectively removes surface soil and some embedded dirt through encapsulation and subsequent vacuuming, rather than through moisture-based soil suspension and extraction. It’s a valuable method for regular carpet maintenance, keeping carpets looking fresh without over-wetting or requiring lengthy drying times.