Glass bottles and jars of many kinds, according to the use of the situation, can be divided into recycling bottles and non-recycling bottles (bottles); according to the manufacturing method, can be divided into molded bottles (bottles and jars molded in a model) and control bottles (bottles made of glass tubes); according to the way of dumping is divided into food bottles, bottles of medicines, cosmetic bottles, bottles of stationery and other supplies. But generally can be summarized as a fine-necked bottles (small-mouth bottles) and thick-necked bottles (large-mouth bottles) two categories.

1.Fine neck glass bottle (small mouth bottle)

Where the inner diameter of the neck of the bottle in 30 millimeters or less, are known as fine-necked bottles, used to hold a variety of liquid substances.

2.Thick neck glass bottle (large mouth bottle)

Bottle neck inner diameter of more than 30 millimeters of bottles and jars, used to hold block, powder and paste-like items.

According to different uses, all kinds of glass bottles and jars have their corresponding technical regulations. Generally speaking, the following basic requirements should be met:

1.Glass quality glass should be melted well and uniformly, as far as possible to avoid stones, streaks, bubbles and other defects. Colorless glass transmittance should be high, color glass color should be stable, and can absorb a certain wavelength of light waves.

2.Physical and chemical properties

2.1 The glass should have a certain degree of chemical stability, can not interact with the contents and affect its quality.

2.2 Glass bottles and jars should have a certain degree of thermal stability, loss rate to a very small.

2.3 Glass bottles and jars should have a certain degree of mechanical strength, to the vibration and impact, pressure and so on.

3.forming quality to ensure that the sterilization and other heating or cooling process to withstand the internal pressure and in the handling and use of the process of 'glass bottles and jars should be in accordance with a certain capacity, weight and shape of the molding, there should be no crooked deformation, the surface is not smooth and flat, and cracks and defects such as unsaturated. Glass distribution should be uniform, not allowed to have localized too thin and too thick, especially the mouth should be rounded and smooth to ensure sealing.