Subject: Rusting of Steel wool

I recently did an experiment on the rusting of steel wool in vinegar.  I 
started with a piece of steel wool soaked in 1/3 cup of vinegar in a jar for 2 
days.  Bubbles form on the steel wool. The steel wool turned dark gray, grayer 
than it's original color.  The vinegar remained clear.  There was no trace of 
brownish color on the vinegar while the steel wool remained in the vinegar 
unlike the one experiment that I did with steel wool soaked in water.  
However, when I took the steel wool out of the vinegar, a day later, the 
vinegar changed color to brownish red with black deposits on the surface and 
side of the jar. Of course once the steel wool was taken out of the jar, it 
started to corrode. My question is why was there no change in the color of the 
vinegar (compared to water and steel wool) but the change in the color of 
vinegar happened only after the steel wool was removed? Also what are the 
black deposits in the vinegar? The deposits looked liked charred material.  
Please  advise.

Thank you  

Re: Rusting of Steel wool