"They do not extract water between the wash and rinses so detergent is carried over to the final spin which is not an efficient way of doing laundry."
Ever since first "washer/extractors" arrived in 1950's there has been considerable debate among professional laundry people about extracting wash between rinses.
On one side there are those who feel extracting loads after washing pulls soiled water through goods resulting in a bad result.
Other side claims spinning between rinses results in need for less of them which results in faster total cycle times.
This being said default still is for commercial machines to rinse once, twice or maybe more before any sort of extracting takes place. This indeed if it happens at all before final spin (extraction).
Until rather recently most all European h-axis washers did not extract until after two or more rinses. Even then the first spin was often a short pulse one. My W1070 does not have any sort of extraction until after third rinse.
Ironically if one choses "Sensitive" on either of my more modern AEG washers they will do two or three deep rinses before first spin. Thus there obviously is a method behind madness.
As for water efficacy I don't know...
Rinsing is a process of dilution. X amount of wash will only absorb "Y" amount of water. Depending upon how generous a particular h-axis washer is with rinse water levels sufficient dilution may take place with only "Z" number of rinses before extraction.
SQ front loaders at local laundromat do not fully extract after washes or first few rinses. They do a gentle pulse sort of spin however...
Ever since first "washer/extractors" arrived in 1950's there has been considerable debate among professional laundry people about extracting wash between rinses.
On one side there are those who feel extracting loads after washing pulls soiled water through goods resulting in a bad result.
Other side claims spinning between rinses results in need for less of them which results in faster total cycle times.
This being said default still is for commercial machines to rinse once, twice or maybe more before any sort of extracting takes place. This indeed if it happens at all before final spin (extraction).
Until rather recently most all European h-axis washers did not extract until after two or more rinses. Even then the first spin was often a short pulse one. My W1070 does not have any sort of extraction until after third rinse.
Ironically if one choses "Sensitive" on either of my more modern AEG washers they will do two or three deep rinses before first spin. Thus there obviously is a method behind madness.
As for water efficacy I don't know...
Rinsing is a process of dilution. X amount of wash will only absorb "Y" amount of water. Depending upon how generous a particular h-axis washer is with rinse water levels sufficient dilution may take place with only "Z" number of rinses before extraction.
SQ front loaders at local laundromat do not fully extract after washes or first few rinses. They do a gentle pulse sort of spin however...