What should a box maker ask its kraft paper mill for?
Ask for CO2e per tonne of kraft paper for a stated year, what it includes, and how biomass fuel was treated. Kraft paper is usually the biggest line in a corrugated box's footprint, so the mill's figure decides most of yours.
The questions
- CO2e per tonne, by grade, for a named calendar or financial year.
- Boundary: mill gate only, or including waste paper and chemicals.
- Fuel mix and how biogenic CO2 was reported.
- Electricity source, grid or captive, and the factor used.
If the mill has no figure
Ask for fuel, power and output for the year and work it out with them. Mark it as supplier data you calculated, not a published figure.
Use it
Multiply by tonnes of paper per box, including trim waste, and add your own corrugator and conversion energy.
What Senseible does here
Senseible reads the energy invoices behind the making stage into a fingerprinted Scope 1 and 2 record, and keeps material invoices on the Scope 3 trail. Material factors come from your supplier or a named database and are labelled with their source, so the product figure can be traced line by line.
Sources: GHG Protocol Corporate Value Chain (Scope 3) Standard, GHG Protocol Corporate Standard
Last reviewed 2026-10-21.