Candle jar cans shall have certain performance and meet certain quality standards.
① Glass quality: pure and uniform, without sand, stripes, bubbles and other defects. Colorless glass has high transparency; The matte black candle jar can has uniform and stable color and can absorb light energy of a certain wavelength.
② Physical and chemical properties: it has certain chemical stability and does not interact with the contents. It has certain earthquake resistance and mechanical strength, and can withstand the heating and cooling processes such as washing and sterilization, as well as the filling, storage and transportation. In case of general internal and external stress, vibration and impact, it can remain intact.
③ Molding quality: maintain a certain capacity, weight and shape, uniform wall thickness, smooth and flat mouth to ensure convenient filling and good sealing. No distortion, unsmooth surface, unevenness, cracks and other defects.
