The most popular oil used in salad dressings is extra virgin olive oil. You can also use vegetable oil, safflower, canola or corn oil.
salad oil manufacturing
It is necessary to shake an oil and vinegar salad dressing before adding it to a salad because they separate easily.
Vegetable oil
No. Oil will dissolve in fatty (hydrophobic) liquids, not in hydrophilics like water.
nonpolar.
Vinegar and oil will separate. Shaking it mixes them together.
Oil and vinegar dressing is a temporary emulsion. When the dressing sits for a while the oil and vinegar separate from each other. If you were to put this on the salad it would taste pretty disgusting because it would be entirely oil. So to avoid this, you shake the dressing and then add it to the salad so that the oil and vinegar is combined and it creates a good flavour.
salad or marinade
no
On their labels the original Wesson and Crisco oils are labeled as vegetable oil. If a recipe calls for a salad oil they were referring to any of the vegetable oils. corn, sunflower oil etc. Most of the oils labeled as vegetable oil including Wesson or Crisco oil are made from soybean oil. The original Wesson oil was made from cottonseed oil. All these oils can also be referred to as salad oil.
Heterogeneous materials can be separated as they are made from separate components. Oil and vinegar salad dressing is an example of heterogeous product.
Salad dressing is a heterogeneous mixture of oil, vinegar, and various other ingredients.