01

Separate a material from a box style

A magnetic closure describes an opening, not a board grade. A kraft appearance describes neither payload nor complete fibre composition. Write the construction and material in separate fields. The structure guide helps identify the opening before you compare material options.
02

What belongs on each material line?

ComponentAsk the supplier to identify
Rigid coreBoard grade, thickness and component location
Folding cartonPaperboard grade, grammage, caliper and printable surfaces
Corrugated packLiners, flute configuration and agreed performance requirements
Wrap or linerStock reference, colour, coating and finishing
InsertMaterial, construction, covering and fit reference
03

Why equal grammage can still give a different result

Grammage measures mass per area, not finished-box stiffness or print quality. We would compare a proposed replacement on the same dieline and loading task. A changed thickness can affect crease behaviour, locks and internal space, even when the stated weight per square metre matches. Ask which sample checks need repeating before accepting the substitution.
04

Keep environmental claims attached to evidence

Ask what a claim covers: one paper, an insert or the complete pack. Coatings, adhesives, windows and hardware remain part of the specification. FSC chain of custody addresses claims through the supply chain; it is not a substitute for a complete-pack recyclability assessment. See FSC guidance.
05

Build an approval record that survives a reorder

Retain stock references, the approved assembled sample and the permitted substitution process. Mark which side is visible and where a finish applies. A photograph can record appearance but cannot replace the material record. Use board and wrap selection when deciding between physical samples.