The second part of The Standard Dry Cleaning Cycle is to move the dirty solvent (insoluble soils) out of the wheel by moving it first from between the garments (Load Bound solvent) to the area surrounding the garments (Bulk Solvent), and then out of the wheel and to the filter.
This part of the cleaning cycle involves an ongoing process of replacing by dilution, the dirty solvent with clean soil-free filtered solvent. This is the part of the cleaning cycle that takes the most time. In fact, an experiment was done by taking only the soil from a normal load, and running it in a cleaning machine with no garments present. It took anywhere from 6-9 minutes just to replace the dirty solvent with clean solvent, with no garments in the way!
Now, when you take the time necessary for step #1, and the fact that garments are also in the wheel, lab tests confirm that ....
IT TAKES A MINIMUM OF 12 MINUTES TO REMOVE THE DIRTY SOLVENT FROM THE SYSTEM!
Choices which can cause poor results
- Incorrect type or insufficient detergent concentration
- Does not cause soil to be released from the garments
- More difficult to hold additional soil in suspension
- More soil available for possible redeposition
- Solvent level too low
- Less solvent available to hold soil
- Not enough to have a good solvent flow
- Insufficient flow of solvent
- Cannot move soil away from garment to the Bulk Solvent
- Overloading the drum
- More difficult for dirty Load Bound Solvent to get to the Bulk Solvent
- Reduced mechanical action
Check out the next posting where I discuss the water soluble soil removal during The Standard Dry Cleaning process.