Layering Cocktails - Specific Gravity Chart

This is a list of the most common spirits and their specific gravity and color.
There's a series of rules you should keep in mind when layering cocktails, they should help you even if you don't know the specific gravity of a liquor:

• Liquids with the highest number are heavier (thus tend to go down in a glass), and should be poured first
• This means you should pour your spirits in order, from the highest specific gravity (first) to the lowest (last)
• Bear in mind that the difference between the specific gravities of two drinks matters (the bigger the difference, the easier it is to keep the layers cleanly separated)
• Alcohol weighs less than water, so as a general rule: liquids higher in alcohol are lighter (and tend to float on top)
• Pouring a liquid from too much height can spoil the layers that are already in the glass, you can avoid this by pouring from a low height or by pouring the liquid on the back of a spoon (which will slow it down)
• For simplicity's sake, most layered cocktails recipes are written heaviest to lightest (in order of pouring)
• It is important to move the glass with care after pouring the ingredients, and to not touch the inside with anything (it will spoil the perfectly horizontal line between the layers)