When complete, strain the particles from the liquid. To make a stronger tea, steep longer or pour the liquid back through the particles in the strainer. Infusions are a type of extraction and are made with leaves only or with leaves as the principle ingredient. The herbs are soaked or steeped in a liquid, usually water, for a period of time. Infusions are not boiled.
Tinctures are a useful form of herbal medicines.
Basically, tinctures are 100-proof alcohol in which a plant has been soaked for a time to be relieved of its specific properties. Tinctures have not been addressed in this text due to their concentrated natural and skill needed in their use. When using herbs, too little is better than too much. The above information was condensed from my book Nature' s Free Pharmacy - Home Remedies Using Nature's Healing Herbs . If you wait it may go out of print or may be difficult or impossible to obtain when you really need it.