Prewash

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Pre wash

Hello Stefan

Now this is interesting as we have been discussing this with the UK boys recently, Alistair (vacbear58) always does a pre wash with whites / high temps and dirty darks but many of us do not unless say for myself washing sofa covers/ curtains / mats etc to sluice the dust and dirt away.

Having grown up with Ariel from the 60`s firstly the blue logo non automatic twintub handwash version mum would always use a pre wash in the sink or nappy bucket using Biotex enzyme powder or Milton steralising fluid for nappies, also green fairy soap bar for stubborn stains shirt collars etc.

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Pre Wash

Most of our UK made automatics Servis Hotpoint Hoover had an independant pre wash which you could select with a high (half way up the door and tub) water level, gentle tumbles heated to 40d then pumpout distribution drain, you then turned the programmer dial to select your main wash programme, heavy duty white wash at 95d could have an auto built in pre wash .

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Pre wash

In 1982 the pre wash / soak wash took a whole new level when Servis Domestic Appliances UK (the only British Independent Laundry Manufacturer) worked in collaboration with Proctor & Gamble
to produce an award winning microchip washing machine, the Servis Quartz, with the new Ariel Automatic with enzymes for cool water washing.

They had an auto pre wash for every programme and a special programme called Multi Fabric Wash which was a low temp soak tumble wash which heated the water to 30d with a high water level and gentle intermittent tumbles , usually set overnight and then finished in the morning ready to line dry. This enabled different types of colourfast fabrics to be washed with light colours and whites taking advantage of the enzyme wash with new Ariel Automatic.

Saying that Ive used the auto pre-wash occasionally and the same with the multifabric wash , reason being for me even with sorted laundry loads this machine completed even a 90d wash pretty quickly.
Ariel was always the default powder of choice prior to that Servis advertised using Daz blue automatic for whites and Bold biological for colours.

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Hi Mike,
it seems like it was mostly the washers where both the temperature and program were set on the timer (vs two separate controls) where the prewash would only advance automatically to the mainwash on the 95° cycle.
 
SQ front loader prewash

Has a prewash and I use it all the time.

Especially for loads of tidy whities.

For two reasons. First, the detergent never makes any suds in the prewash because antiperspirant residue in T shirts poses a challenge. The pre wash takes care of that.

Second, it preheats the clothes and tubs, so that when the main wash fills with hot again, it stays piping hot. No need for a heater or lengthy delays heating the water.

And I suppose third it substitutes for a warm rinse in situations where one would be useful.

I love it. Wouldn’t want to be without the option. Results in impeccably white and clean tidy whities and linens and sheets every time. It’s also good in Winter for keeping a warm load warm during the main wash cycle.

After the pre wash, the SQ spins on low speed for a minute or so while draining, but it doesn’t go into a full high speed spin.

There’s only one catch. The SQ adds chlorine bleach in the pre wash, which is of course the wrong time. Best to let detergent and enzymes work alone for awhile first. So the work around for that is to add chlorine bleach to the drawer after the pre wash has filled. Most of the time the bleach compartment will have pre wash fill water in it, so I just remove the drawer and dump that water out if jiggling the drawer doesn’t drain it. Or, the bleach could be diluted and poured in via the main detergent compartment at any desired delayed time during the main wash. Also the main wash detergent must be powder, because liquid in the main wash compartment will merely run into the prewash water. Not a problem for me because I use powder anyway in the white loads where I use the prewash option.
 
I should add

I don’t wish to sound as if I am saying that the SQ FL is the be all end all only machine to buy.

I do like mine and I would buy another but like all things, they are not perfect machines. They can rarely fail to abort an unbalanced load, e.g.

Anyway the point here is that whichever brand of FL one has, one observes what various cycles do, and adapts cycles and settings to achieve the desired result. And in the SQ the prewash is useful for that. Other brands have stain and steam and other options that would no doubt be useful.
 
Extraction

I never considered where there is a possibility of forcing soils deeper into clothes. Though, the purpose of a prewash is to remove the soils that are easier to remove. Most harder soils and stains likely would require enzymes and/or heat to be removed anyways. So I’m not sure I buy it 100%. Maybe a slower interim spin would be a decent trade off. There was that study that showed how more rinses led to cleaner was results because soils were ‘extracted’ during interim spins. Not sure if I can find and repost that.
 
Think about what happens during extraction/spin cycles. You are forcing water and any soils present through fabrics as they are forced to sides of tub to exit via holes.

Soil and muck will be strained through laundry especially things in middle. Not extracting until after two, three or more rinses ensures most if not good portion been removed. Same would apply for extracting between pre-wash and main cycle.

Again not everyone agrees with this theory. For ages when wash was done by hand laundry was extracted (ok, wringed or put through mangle), before each change of water. This lessened amount of soil carried over into next cycle. Those who take up this position feel subsequent rinses, especially done with enough water and good agitation will liberate any soil and muck trapped in textile fibers, flush it out into water that will go down drain.

Interestingly if one chooses "Sensitive" on AEG washers there are two deep rinses after main wash with no extraction in between. OTOH normal "Cottons/Linens" does extract after main wash and each subsequent rinse. In short "Sensitive" option is rather like my older Miele washer which gives three rinses before first spin.

Thing is less water is used for rinsing (largely by eliminating one or more cycles),if extraction is done after wash and between each rinse.

Savings in water are still had even though extracted laundry will absorb more water at next fill because it is drier. Savings come from eliminating a few of those rinse cycles.

Of course modern front loaders often use far less water per rinse than machines of old. So even if they still have three or four rinses overall water use is probably less.
 
Cannot speak for other side of pond, but here in USA as of 1970 presoak products were no different than detergents, loaded with phosphates.

Axion, Biz, Amway Trizyme.. were all > 60% phosphates. Biz was lowest at about 61% but rest were over 70%.

 
Miele seems to automatically run a prewash on the W1 machines if you select heavy option on the soil level query for the auto dispenser.

The only time I could see it as being useful is if the clothes are actually soaked in something that's going to wash back into the water, like maybe something absolutely covered in mud.

I find it genuinely useful for muddy football gear. That's about all though. I mean what else gets THAT dirty?

I guess maybe something like a completely messed up table cloth or baby clothes that have been absolutely covered in food or .. worse or very messed up work overalls perhaps?

It's an option that's still available on a lot of European machines, and a bit like the boil wash cycle, I think it's very rarely used.

From an environmental point of view, it seems like a waste of resources. I've never seen a front loader (certainly any I've owned) fail to do a good job if you use the right detergents and a good wash cycle i.e. not the 15 min quick wash or something ridiculous.

I definitely remember using self-service commercial machines in a laundrette in London in the mid 2000s that all did a prewash as part of the standard cycle, which was very short, very splashy and very deep. Definitely cleaned the clothes well, but it was using a lot more water and chemicals than a typical household machine.
 
Use pre-wash

For soiled kitchen cloths as I tend to use them for getting things out of the oven and if they spill the cloth catches the mess and saves cleaning up.

Some cloths with heavy staining IE tomato benefit from a prewash before the main hot wash of which I tend to choose a 75c temp, Have used the 95c to clean the machine and whiten towels but have stopped using it as a normal temp due to electricity prices rising.

Have also started to save all whites and take them up the shed to wash/boil in twin tub thus reusing hot water over and over then after a good spin to get the detergent out I put them in a whirlpool top loader to rinse it does a great job !!

Austin
 
Interesting.....

Understand a bit of that German commercial for Persil. Well not exactly what is being said, but the advertising pitch in general.

This "neue" Persil had common protein enzyme (subtilisin) and used sodium perborate as oxygen bleach.

Results one achieved depended upon temperature for certain washes.

Kochwasche - is "boil wash" hence the pile of whites in front of box marked so.

Buntwäsche - is coloured fabrics that one washed at 60 degrees Celsius

Feinwasche - cold or warm wash (30 or 40 degrees Celsius) for things made from rayon, synthetics, but not wool or silk. The latter would be harmed by enzymes.

Thanks to addition of enzyme no presoak product was necessary.

Like Ariel in other commercial Persil box says this product is " hauptwaschmittel" indicting it is used in main wash, not a presoak product. However of course one could use it so if wished.

 
Reply #20: Ariel

The original Ariel was in a packet with blue emblem, and was a high-sudsing enzyme powder for twin-tubs, and suitable for use in the likes of the original slanted Hoover Keymatic, and Hotpoint agitator top-loaders.

When my mum got her Hoover automatic in 1980, the only two detergent options were P&G's low suds enzyme Bold Automatic or Lever's low suds Persil Automatic. She never liked Bold, so used Persil instead.

Ariel Automatic appeared somewhere around 1982. This was in a box with the green logo, and was a low suds enzyme powder.
 
Ariel

Overhere in the Netherlands Ariel was available with the blue logo as a low sudsing detergent for automatic washing machines. That is the same as the one in the first commercial Launderess posted in Reply #3. I used that detergent in my Philips AWB119 toploader that I bought in 1982. I think I used a box or two before the move to Ariel with the green logo.
 
Ariel in the UK originally launched as a high suds, enzyme formula aimed at top load machines (mostly non automatic), which were still dominant in 1969 when it launched. Bold was marketed towards automatics.

Ariel launched two years earlier on the continent and may have been an automatic (low suds) formulation from the beginning in some markets.
 

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