On Friday, 17 July 2015 11:52:20 UTC+1, Etaoin Shrdlu wrote:
Also, flat items are dried on a "Calender" (rollers heated with steam).
They go in damp and come off dry.
Only linen and cotton will stand this treatment.
But nothing living can survive.
1) The British public (and probably all in the western world), are
neurotically and unnecessarily obsessed with the hazards of 'germs'.
Those that can do real harm are few and far between. It's not as
though we suffer the ravages of tropical diseases, and our immune
systems can cope with the rest, if properly trained (which they
probably aren't these days, due to our neurotic and unnecessary
obsession, see above).
2) Detergents in dishwashers wash away the germs along with the food
residues; it's what they do. Just like soap when you wash your hands.
You don't have to wash your hands in bleach or boiling water to remove
germs. Dishwasher detergents are probably sufficiently caustic to kill
the germs anyway, irrespective of temperature.
And unless the clothing has been exposed to some significant nasty, I'm
not sure what we are supposed to be catching from clothes washed at 30C
or whatever (and again, surely the detergent will get most of them?)
On Fri, 17 Jul 2015 15:08:49 +0100, Chris French wrote:
<snippage> > And unless the clothing has been exposed to some significant nasty, I'm
A lot of the clothing I have is limited, on the label, to 40C; some to 30C,
so a higher temperature would risk damaging them.
The bedding and some clothes are rated for 60C - that's not high enough to
kill the nasties.
Now, I can't recall the exact temperature, but ISTR that the water samples I
used to test for bacteria were incubated at somewhere close to 40C as being
the ideal temperature for the bacteria to multiply. This seem to make 40C
the worst temperature: doesn't kill and does encourage bacteria whilst using
At 30C, it's about the same as the clothes would be when worn as a single
layer, so no change; at 20C, if the detergent does work well(2), the energy
is much less than at 40C (obviuosly) and the bugs will be "out of their
comfort zone" (sorry).
(1) Sadly, I log the energy per wash. The difference between 30C and 40C,
with the smae loading and close in time so that the incoming water will be
about the same, is around 35%.
(2) In Asda t'other day (sorry again - looking at LED lamps, honest) the
own-brand non-bio powder boasted of being suitable for 15C. A recent wash at
20C used about 30% of the energy of a 30C one, although I didn't see the
current go up to indicate the heaters being on, but I might have missed it.
The washing cycle is not just water. There is also the process of
thoroughly drying. Irrespective of how hot the wash if damp clothes are
left in a pile they will start to 'smell' within a very short period as
organisms in the air find a new home.
I assume that detergent is not added to the 40C water when growing
bacteria and it isn't followed by a spin/rinse cycle
15C washing detergent has been on sale in UK supermarkets for a decade
or more and I believe in the USA for a lot longer. Often as 'own brand'
and often a half the price (or lower) than some of the widely advertised
Does that mean you don't wash your hands after having a shit?
You might be surprised just how far such bugs get scattered during that
operation. Onto your clothes and surrounding surfaces. Enjoy your dinner.
*Time is the best teacher; unfortunately it kills all its students.
Dave Plowman firstname.lastname@example.org London SW
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