The technical requirements for glass skin care bottles mainly include the following aspects:
Appearance quality requirements:
The surface of the glass bottle should be smooth and flawless, without bubbles, cracks or scratches. The size, inclination and roundness of the bottle mouth must meet the standards.
There should be no rust, oil, water and other contamination that is difficult to wipe off in the bottle, and there should be no foreign matter such as paper scraps, insects, hair, broken glass, metal, etc. in the bottle.
The bottle mouth, bottleneck, thread and other parts must be smooth and flat, without deformation, incompleteness or roughness.
Physical performance requirements:
The mechanical properties of the glass bottle must meet the regulations, such as the bearing capacity of the bottom of the bottle should reach a certain value, and the tensile strength and torsional strength of the bottle stopper are also specified in detail.
The thickness of the glass bottle should be uniform, not less than 1.5mm, and there should be no cracks, cracks or damage in all parts of the bottle body.
Chemical performance requirements:
The chemical stability of glass bottles must meet relevant requirements, including pH value, heavy metal content, barrier properties, water absorption rate and other indicators.
Glass bottles should have good heat resistance and thermal stability to cope with the heat sources that cosmetics may be exposed to during use.
Sealing performance requirements:
Glass bottles should have good sealing performance to prevent leakage or deterioration, and effectively prevent the influence of external gas, moisture and dust.
Material selection:
High-temperature resistant borosilicate glass is usually selected. This glass is heat-resistant and stable, not easy to burst, and safer than ordinary glass