1, coarse salt for seawater or salt wells, salt ponds, salt springs in the brine by frying and sunshine into the crystallization, that is, natural salt, is unprocessed large salt, the main component of sodium chloride, but due to the presence of magnesium chloride and other impurities, in the air more prone to deliquescence.

2, fine salt, also known as processed salt or refined salt, is after the removal of impurities after crystallization again precipitation of salt, impurities, after processing some trace elements have been removed, and sometimes add iodine, deliberately made iodized salt, used to prevent thyroid disease.

Attachment:

Coarse salt nutritional analysis

1. Coarse salt has the role of sweating, it can be discharged from the body's waste and excess water, to promote the skin's metabolism, but also soften the dirt, supplemental salts and minerals;

2. used for Wound cleaning can prevent infection;

3. Sprinkle on the food can be short-term freshness can be used to pickle food can also prevent spoilage.

China's salt according to the processing method, there are coarse salt and fine salt (refined salt) two kinds of fine salt, fine salt characteristics are as follows:

1, grain shape: fine salt is a large grain of salt through the processing of salt, the morphology of the Department of the flake, the form of small.

2, composition: the main chemical composition of salt is sodium chloride. Sodium chloride can help the body to play the role of osmosis, such as food after digestion into a soluble body, there must be a sufficient concentration, in order to go through a variety of cell permeability to the blood, so that the nutrients are sent to the body's various tissues. Usually fine salt contains sodium chloride in more than 96%.