Half a croissant, on a plate, with a sign in front of it saying '50c'
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Soap-Detecting Dishes

Soap-free dishes promote cleanliness and healthiness
  [vote for,

A very small amount of dishsoap can decimate the numbers of bacteria in your intestinal tract. This can cause rather violent, unexpected and prolonged episodes of diarrhea.

A small patch of soap-reactive material imbedded into plates and cups (especially cups, since they are notoriously hard to rinse properly) could detect these irritating minute amounts of dishsoap, and ensure little Timmy has properly rinsed the dishes after his chores.

alc, Apr 12 2004

lipid sensors http://www.sensorsm.../0503/10/main.shtml
on a molecular level, sounds promising [dentworth, Oct 04 2004, last modified Oct 05 2004]


       ok, it seems like a good idea, would the plate change color? turn on an alarm? what is the detector?
dentworth, Apr 12 2004

       Ideally the reactive material would change colour - but how, is unknown to me. Soaps work by encapsulating miniscule fat droplets in water (emulsion), so some sort of fat-based chemical that reacted in the presence of soap would probably be the best type of indicator.   

       When Hydrogen Peroxide and Sodium Iodide are added to dishsoap, this reacts... perhaps some tinkered peroxide-based material?
alc, Apr 12 2004

       In case of the dire rear.
gnomethang, Apr 12 2004

       Puzzled by this: I have always associated prolonged bouts of diarrhea with badly washed dishes (or food), not the soap itself. In fact, I've imbibed plenty enough soap in my life, and never noticed any undue side effects of this kind. Maybe my bacteria are more robust than yours?   

       Actually, every Internet article I can find quickly links soap to *reducing* the incidence of diarrhea, not increasing it (unless you're talking about drinking it neat, which you're not). If you think or know otherwise, please provide a suitable link.
DrCurry, Apr 12 2004

       Much better on the rocks.
waugsqueke, Apr 12 2004

       //In fact, I've imbibed plenty enough soap in my life, and never noticed any undue side effects of this kind.// Try not to drink soap for a while and see if there are any changes. If your bacteria rely on soap you may get constipated.
kbecker, Apr 12 2004

       Ahem: I didn't say it was a daily occurrence.
DrCurry, Apr 12 2004

       Bacteria in your digestive tract can die one of three ways: Being killed by your body (fever), being killed by another organism (infection), or some other agent (antibacterial soap).   

       Naturally, there are different kinds of soap - Having your mouth washed out with a bar of soap may not have the same effect as taking a shot of Palmolive. I'm curious, however - How did you manage to eat so much soap?
alc, Apr 12 2004


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