Repacking 20kg wallpaper glue powder into 200g, 300g, 500g or 1kg retail units adds opening, exposure, weighing, sealing and label steps. A compliant raw material can still become untraceable if repacking lots are mixed or powder absorbs moisture during the local process.
Complete line clearance before starting
Remove residual powder, empty bags, labels and packaging from the previous product or lot. Check the hopper, weighing tools, work surface and surrounding area. Record the time, operator and inspection result. Verbal confirmation alone is weak when several white powder products look similar.
Handle one identifiable lot at a time
Keep the original 20kg bag label visible and match it to the repacking instruction. Separate different lots physically or by a documented time boundary. Reseal unused material and label the original lot, opening time and remaining weight; never transfer it into an unmarked container.
Control moisture, foreign matter and personnel flow
Keep the exposure area dry and away from wash water, open doors and damp packaging. Use covered containers and dedicated tools with defined glove, clothing and access practices. Stop using the affected container and retain a sample if unusual lumps or foreign matter appear.
Verify packaging and labels together
At each pack-size or language-version change, check film, artwork revision, barcode, declared weight, lot-code position, seal and outer carton. Approve a first-off sample before continuous production. Count and quarantine obsolete or excess labels so correct powder cannot enter the wrong market version.
Use yield reconciliation to find problems
Record input 20kg bags and weight, accepted retail packs, QC samples, remainders and loss. Investigate abnormal differences between theoretical input and actual output before lot release; possible causes include weighing error, leakage, rework or recording mistakes. Hangzhou Karn supplies bulk or OEM packs, while a buyer operating local repacking controls its own line quality and compliance.