Blueprint: Oxygen-Scavenger Sachets for Hermetic Grain Storage — Manufacturing and Use Specification

DESIGN BLUEPRINT — SIMULATED, NOT MEASURED — NOT BUILT. A manufacturing-and-use specification for iron-based oxygen-scavenger sachets for hermetic grain storage, derived from the source paper: William Alexander Aldred, 'Oxygen-Scavenger Sachet Sizing for Hermetic Grain Storage: A First-Principles Oxygen Budget and Design Rule', DOI: 10.5281/zenodo.24108488. The blueprint specifies sachet composition and construction (iron fraction 0.65, utilisation 0.80, effective capacity 0.157 litres of oxygen per gram of formulation), charge masses per tonne of grain at 15, 20, 25, 30 and 35 degrees Celsius for 6 and 12 months of storage (1,087 grams per tonne upfront plus a temperature-dependent monthly term, 14.2 grams per tonne per month at 25 degrees Celsius), the 50 kg smallholder bag translation (54.3 grams upfront and 0.71 grams per month at 25 degrees Celsius; one 60 gram sachet covers about 8.0 months), the store and bag specification the sizing assumes, placement and sealing sequence, operating envelope, tolerances, failure modes including permeation limits, storage and handling, and a charge-verification procedure. All figures are model results, simulated and not measured, and no sachet or store described has been built or field-tested.