Glass Containers-Food Glass Jar Quality Standard

This document describes the definition, performance requirements, testing methods and testing regulation of food glass jar. All glass containers-food glass jars supplied by Weihai Fuou Trade Co., Ltd will meet the following standard.

1.Definition

Food glass jar is the glass jar with finish ID more than 30mm and nominal capacity from 50ml to 500ml.

2.Performance Requirements

1. Physical and Chemical Properties

 
 

Item	Thermal(shock) endurance/℃	Stress/class	Inner hydrolytical resistance
Requirements	≥45	≤4	GB4548-HC3 class

 

1. Specification Size
   1. Brimful Capacity

 
 

Capacity/ ml	50-100	＞ 100-200	＞ 200-300	＞ 300-500	＞ 500-1000	＞ 1000-5000
Tolerance	±4ml	±6ml	±8ml	±10ml	±12ml	±1% capacity

 

1. Bottle Height

The bottle shorter than 175mm should meet the following sheet. For the bottle higher than 175mm, the tolerance should be calculated according to the format(A.1) on the attached appendix.
 
 

Height/mm	≤50	＞50-75	＞75-100	＞100-125	＞125-150	＞150-175
Tolerance/mm	±0.8	±0.9	±1.0	±1.1	±1.2	±1.3

 

2.2.3Body Outer Diameter

When the body outer diameter is less than 90mm, the tolerance should meet the following sheet. When the body outer diameter is more than 90mm, the tolerance

should be calculated according to the format(A.2) on the attached appendix.
 
 

Body Outer Diameter/mm	≤50	＞50-60	＞60-70	＞70-80	＞80-90
Tolerance/mm	±1.1	±1.2	±1.3	±1.4	±1.5

 

2.2.4Ovality

The max tolerance shouldn’t more than 75% of body outer diameter tolerance.

2.2.5Body Thickness

Shouldn’t less than 1.2mm

2.2.6Bottom Thickness

Shouldn’t less than 1.2mm

2.2.7Thickness Difference

Shouldn’t less than 1.2mm

2.2.8Non-parallelism of Finish with reference to Container Base, Dipped Ring, Outer Diameter of the Finish

 
 

Finish inner diameter/mm	30-50	＞50-70	＞70-80	＞80
Non-parallelism of finish with reference to container base/mm	≤0.8	≤0.9	≤1.0	≤1.2
Dipped ring/mm	≤0.3	≤0.4	≤0.5	≤0.6
Finish outer diameter tolerance/mm	±0.3	±0.4	±0.5	±0.6

 

1. Appearance
   1. Finish Defects

The finish shouldn’t be flanged, there shouldn’t be defects affecting sealing on sealing surface.

2.3.2Crack

There shouldn’t be retracted crack.

2.3.3Stone

There shouldn’t be stone larger than 1mm.
The stone without crack from 0.3mm to 1.0mm shouldn’t be more than 2pcs. There shouldn’t be stone on the sealing surface.

2.3.4Mould Seam

Shouldn’t be sharp.
The mould seam convexity shouldn’t be more than 0.5mm.
The mould seam convexity of finish outside shouldn’t be more than 0.2mm.

2.3.5The Degree of Smooth

There shouldn’t be obvious crack, corrugated, cord, cold mould, black speck, oil mark and other defects affecting appearance.

2.3.6Defects of Inner Wall

There shouldn’t be stuck ware and stuck glass particles.

2.3.7Bottom Defects

There shouldn’t be sunken bottom and other bottom defects can’t insure bottle body stand stably.

2.4 Amount of Lead and Cadmium Dissolution

 
 
 
 
 
 
 
 
 
 
 
 

Capacity/ml	Allowed limited amount
	Amount of lead dissolution/(mg/L)	Amount of cadmium dissolution/(mg/L)
＜600	1.5	0.5
600-3000	0.75	0.25
＞3000	0.5	0.25

 

3. Testing Methods

1. Physical and Chemical Properties
   1. Thermal(shock) Endurance

Test according to GB/T 4547

3.1.2Stress

Test according to GB/T4545

3.1.3Hydrolytic Resistance

Test according to GB/T 4548

3.2Specification size

1. Brimful Capacity

Test according to GB/T 20858

3.2.2Bottle Height

Test by height vernier caliper with division value of 0.02mm or other height measure devices.

3.2.3Body Outer Diameter

Test by vernier caliper with division value of 0.02mm or other outer diameter measure devices, all spots on the same cross section should meet requirement.

3.2.4Body Ovality

Test maximum outer diameter and minimum outer diameter of same body cross section according to 3.2.3. Body ovality should be calculated according to the following format:
O=Dmax-Dmin
*O: body ovality/mm
*D_max: maximum body outer diameter/mm
*D_min: minimum body outer diameter/mm

3.2.5The Thickness of Body and Bottom

Test by thickness gauge with division value of 0.02mm

3.2.6Thickness Difference of Same Bottom

Test maximum and minimum thickness of same bottom according to 3.2.5, the ratio should be thickness difference of this bottom.

3.2.7Non-parallelism of Finish with reference to Container Base

Test maximum and minimum finish height according to 3.2.2. Non-parallelism of finish with reference to container base should be calculated according to the following format:
△H=Hmax-Hmin
*△H: Non-parallelism of finish with reference to container base/mm
*Hmax: maximum height
*Hmin: minimum height

3.2.8Dipped Ring

Put the bottle or jar on horizontal board with bottom up, and make that stable. Test the gap between finish and board by 0.05mm feeler gauge. When the tested bottle or jar doesn’t move and feeler gauges are in inner finish, the feller gauges stuff. The maximum thickness feeler gauges can stuff is dipped ring.

3.2.9Finish Inner Diameter and Outer Diameter

Test by vernier caliper with division value of 0.02mm.

3.3Appearance

Visual test away from 30cm under non-direct light. Using vernier caliper, specified measure gauge, feeler gauge and magnifying glass if necessary.

3.4Amount of Lead and Cadmium Dissolution

Test according to GB/T21170

4Testing Regulation

IL and AQL should be made according to the following sheet.

 

Category	Item	Inspection Level    (IL)	AQL
Physical and chemical property	Thermal(shock) endurance	S-3	0.65
	Stress		1.0
Specification size	Non-parallelism of finish with reference to container base, dipped ring, outer diameter of the finish	S-4	1.5
	Capacity, height, thickness difference		1.5
	Thickness, outer diameter of the body, body ovality		2.5
Appearance quality	Defects of finish, crack, stuck glass particles, bird cage	II	0.65
	Stone, bubble, mould seam, smooth		4.0