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Below is a chart of commonly available oils based on their common classification:

Blending does not have hard and fast rules that must be followed to create that wonderful blend that you’ll love for a lifetime. The lack of limits and restrictions is what makes perfumery an art form. Having said that, a few tips will help get you off to a fine start:

Tips

• When creating a new blend, start out small with a total number of drops of either 5, 10, 20 or 25 drops. 25 drops should be the most that you start with. By starting small, you waste less oil in your blending experiments.
  
  
• Start creating your blend by only using essential oils, absolutes or CO2s. After you have designed the blend, then you can dilute it by adding carrier oils, alcohol, etc. If you hate the blend you created, you have then not wasted any carrier oils or alcohol.
  
  
• Keep a notebook that lists each oil that you used with the number of drops used for each oil. When the creative juices flow, it is easy to get carried away and later forget the exact recipe for your blend; one drop too much or too little of even one oil can drastically change the aroma of your blend. When you find that perfect blend, you want to be able to reduplicate it, and it’s near impossible if you didn’t take notes! If you are especially ambitious, it’s also a wise idea to note the vendor name of the oil that you used as the aroma and quality of oils do vary between vendors (even with the same vendor, the aroma of oils can vary from batch to batch, due to crop fluctuations and resourcing).
  
  
• To store your beautiful creations, perfume sample bottles and 2ml amber “shortie” bottles are very inexpensive and can often be purchased from aromatherapy vendors and glass bottle companies.
  
  
• Be sure to label your blends clearly. If you don’t have enough room to specify exactly what your blend is, label it with a number that corresponds to a number in your notebook.
  
  
• Start off your blending experiments by creating blends that are made up in the following ratio (you do not have to be exact – this is just a guideline to get you started): 30% of the oils are top notes, 50% are middle notes, and 20% are base notes. See the chart above to find out what oils belong to each category.
  
  
• Some oils are much stronger than others, especially the absolutes and CO2s. Study oils you wish to use in a given blend and observe the oils that have the strongest aromas. Unless you want those oils to dominate the blend, you will want to use dramatically less of the stronger oils in your blend.
  
  
• To learn more about the strength of oils, it is useful to try experiments where you add one drop of a selected essential oil to 5 drops carrier oil to get a 20% dilution, smell it, study the aroma, then add another 5 drops of carrier oil to get a 10% dilution, smell it and study the aroma again, then repeat as desired. This can help educate you on the characteristics and strengths of each essential oil at various dilution ratios.
  
  
• After creating your blend, allow it to sit for a few days before deciding if you love or hate it. The constituents (natural chemicals) contained within the oils will get cozy with each other and the aroma can change, usually rounding out a bit.

好复杂啊，努力学习