Packaging Line Considerations
The packaging line is the last production control point before a product leaves the brewery. For GF beer, it is also a potential cross-contact point if the line is shared with barley-based products and cleaning validation is not rigorous.
Line decisions — owned vs contracted, dedicated vs shared, manual vs automated — all carry cost, quality, and GF integrity implications that interact with each other.
| Line Variable | Options | GF Implication |
|---|---|---|
| Ownership | Owned, contract (mobile canner/bottler), co-packer line | Owned = highest control; contract requires audit |
| Dedication | Dedicated GF line | Shared with validated cleaning |
| Oxygen control | Counter-pressure fill, CO2 purge, inline DO meter | Critical for GF styles with soft malt character |
| Throughput | Manual (low volume), semi-auto, fully automated | Affects feasibility at different production scales |
| Cleaning validation | CIP with ELISA verification, allergen swab | Required for any shared line GF claim |
| Seam / crown integrity | Inline seam checker, periodic destructive test | Seam failure = oxygen and contamination risk |
Mobile Canning and GF Risk
Mobile canning services are popular with small craft breweries because they eliminate capital cost. For GF producers, mobile canners introduce a new variable: the mobile unit may have run barley beer at a prior account the same day. Requiring documented pre-run cleaning and an ELISA rinse test before your GF fill is a reasonable standard — get it in writing before the truck arrives.
Mobile bottling carries the same consideration. The convenience is real; the due diligence requirement is equally real.
Packaging line risks:
- Mobile canner residue from prior barley fill introducing cross-contact
- High DO at fill shortening shelf life undetected until consumer complaints
- Inadequate seam integrity allowing slow oxygen ingress over weeks
What a well-managed packaging line delivers:
- Consistent fill quality that matches the production investment
- Documented GF compliance at the last internal control point
- Low DO performance that protects shelf life and consumer experience
Source Notes
Packaging line guidance based on craft brewery fill quality standards, mobile canning due diligence practice, and GF allergen control at the packaging stage.