Airtight Glass Storage Jars with Metal Lids | 25ml to 1000ml

1. Process bottle molds, mouth molds and

2. Polish and heat treat molds to improve durability and precision

3.Milling machine processing molds in workshop; close-up of polished precision molds

4.Mold accuracy directly determines bottle smoothness; threaded mouth of pickle jars is strictly controlled for tight sealing

1.Mix food-grade raw materials: quartz sand, soda ash, limestone, etc

2. Send raw materials into glass furnace and melt into liquid glass at 1500℃ high temperature

3.Worker weighing raw materials; rolling liquid glass in high-temperature furnace

4.Strictly control heavy metal content, fully comply with FDA and LFGB food contact safety standards

1.Inject liquid glass into molds via press-and

2. Open and close molds to

3. Convey to cooling belt and cool to 600℃

4.Automatic bottle forming machine in operation; newly formed glass bottle blanks

5.Press-and-blow process ensures uniform wall thickness, enhancing drop and pressure resistance of pickle jars

1.Send bottle blanks into annealing kiln for slow cooling (from 600℃ to room temperature in 2-3 hours)

2. Eliminate internal stress of glass to prevent cracking

3.Glass bottles conveying evenly in annealing kiln; temperature monitoring dashboard of annealing kiln

4.Key step to prevent bottle breakage; avoid cracking during transportation and temperature difference changes

1.Bottle mouth polishing: remove burrs to ensure perfect sealing

2. Surface printing: adopt high-temperature screen printing or decal firing

3. Automatic cleaning & drying: high-pressure spraying to remove impurities

4.Worker polishing bottle mouths; automatic screen printing machine working; glass bottles in cleaning line

5.Ensure no burrs and stains, meet food-grade safety requirements; logos are durable and dishwasher-safe

1.Full inspection: wall thickness measurement, capacity calibration, 2-hour

2. Sampling inspection: drop test, heavy metal migration test

3.Inspector measuring bottle wall thickness; sealing test on site; qualified quality inspection report

4.Eliminate unqualified products, finished product qualification rate ≥99.5%

1.Adopt shock-proof food-grade packaging (bubble film + partition cartons)

2. Label, pack and store finished bottles in warehouse

3.Automatic carton packing line; neatly stacked finished pickle glass jars in warehouse

4.Shock-proof packaging adapts to long-distance international transportation, preventing collision and breakage