Slotted Corrugated Boxes AQL Policy

Use these quality criteria alongside the AQL quality inspection guide to determine the severity of defects present in a given lot.

Material	Optimum	Minor	Major	Critical

Texture consistency

Not visible at 18” in non-reflective light

Not visible at 20” in non-reflective light

Not visible at 22” in non-reflective light

Not visible at 24” in non-reflective light

Paper tears

1/4"

3/8"

1/2"

> 1"

Delamination

None

–

Present

Coating	Optimum	Minor	Major	Critical

Coating distribution

None

–

Present

Cracking

None

–

Present

Blistering

None

–

Present

Speckling

None

–

Present

Dimpling

None

–

Present

Cutting	Optimum	Minor	Major	Critical

Print-to-cut registration single operation

1/16"

–

> 1/16"

Print-to-cut registration multiple operations

1/8"

–

> 1/8"

Score line cracking

1/4"

–

> 1/4"

Handling	Optimum	Minor	Major	Critical

Scuffing

1/8" × 1/8"

1/4" × 1/4"

3/8" × 3/8"

> 3/8" × 3/8"

Printing (Flexography)	Optimum	Minor	Major	Critical

Print plate registration

1/16”

1/8”

1/4”

> 1/4"

Ink color accuracy

2.0 Delta E

2.2 Delta E

2.4 Delta E

> 2.5 Delta E

Print plate registration

3/8"

1/2"

5/8"

> 5/8"

Text size

Matches proof

–

Does not match proof

Trapping

Matches proof

–

Does not match proof

Ghosting

Matches proof

–

Does not match proof

Color consistency

Matches proof

–

Does not match proof

Stray marks within 1" of logo

1/16” diameter

1/8” diameter

1/4” diameter

> 1/4” diameter

Stray marks outside logo area

1/16” diameter

1/8” diameter

1/4” diameter

> 1/4” diameter

Ink rubbing

1/2" length

–

> 1/2" length

Glueing	Optimum	Minor	Major	Critical

Glue squeeze

None

–

Present