Re: [Phys-l] experiments with dyes (was: happy equinox)

[Brian Whatcott <betwys1@sbcglobal.net>]

At 07:43 AM 3/24/2008, you wrote:
> Whenever I hard boil white eggs,  I put some brown onion skin in the
> water to mark them,  to distinguish them from raw ones in the fridge.
>
> I also put an ounce or two of vinegar in the water.  This seems to
> make the peeling better.
>
> Sometimes when I used skin from red onion, the eggs came out bright yellow.
> --
>
>
> Clarence Bennett


Onion skin, saffron, paprika hve seen use as natural yellow dyes.
Vinegar and brine have been used as mordants.


Brian Whatcott    Altus OK    Eureka!