Yes you need to keep your dressing in the frig, if you were having a party and needed to keep it out for guess to use, you can do so safely for about 3 hours, after that you must decard it.
To prolong this period, you could keep the dressing in an ice bath.
Hey Drummer,
When I started my first class in culinary arts school three years ago, I had to purchase a knife set through the school.
The set is great, it has what you need and the knifes are top quality and are made (I believe) in Germany.
I highly recommend this knife set for it's quality.
I...