2025 From Raw Materials to Finished Products: Unveiling the 360° Quality Control Process of a Bread Bag Factory​

When you pick up a freshly baked loaf, the bread bag is its first “protector”—and behind this simple packaging lies a strict quality journey that starts with From Raw Materials to finished products. Our factory’s 360° quality system, built around the principle of From Raw Materials to end, ensures every bag is safe, durable, and up to global standards. Let’s break down the key steps of this From Raw Materials-to-finished process!​

🌱 1. Raw Material Selection: The Core of “From Raw Materials to Finished” Quality​

Raw materials are the starting line of our From Raw Materials-driven quality control—we focus on two main options: food-grade PE y kraft paper, both screened to meet the highest safety benchmarks.​

For Food-Grade PE (Polietileno):​

✅ Only source from suppliers with FDA & SGS certifications—this is the first checkpoint in our From Raw Materials proceso (global food safety standards non-negotiable).​

✅ 3-step inspection before factory entry (a must for From Raw Materials calidad):​

1. Check certification docs to confirm compliance with food contact material rules (no shortcuts in From Raw Materials screening).​

2. Laboratory sensory test: No strange smells, discoloration, or impurities (even a tiny black spot = rejection—we don’t compromise on From Raw Materials calidad).​

3. Migration test: Soak PE film in simulated food solution (P.EJ., acetic acid for acidic foods) at 40°C for 24h—test for heavy metals/plasticizers (critical for From Raw Materials seguridad).​

✅ Must meet China’s GB 4806.7-2016 standard (food contact plastics) to move from From Raw Materials stage to production.​

For Kraft Paper (Premium Bread Packaging):​

🌿 Prioritize 100% recycled fibers with FSC certification—eco-friendliness is part of our From Raw Materials criteria (no toxic additives allowed).​

✅ Random sampling tests (key for From Raw Materials consistency):​

1. Basis weight: Minimum 80g/m² (prevents tearing when holding bread—durability starts at From Raw Materials).​

2. Moisture content: 8%-12% (too wet = mold; too dry = brittleness—we control this at From Raw Materials stage).​

3. Grease resistance test: Apply edible oil, observe 24h—no seepage allowed (seepage ruins bread texture, so we eliminate this risk at From Raw Materials).​
   

🎨 2. Printing Ink Testing: Seguro & Beautiful—A Link Between From Raw Materials and Finished​

After passing From Raw Materials checks, the next step is printing—and ink safety is as critical as raw material quality. We follow a “zero-toxic ink” rule to keep the From Raw Materials-to-finished chain safe.​

✅ Only use water-based ink (no VOCs = non-toxic, inodoro, no harmful residue; unlike solvent-based inks—this choice aligns with our From Raw Materials safety standards).​

✅ Pre-use third-party lab tests: Heavy metals (lead, mercury, cadmium) and benzene compounds must be “undetectable”—we treat ink like a raw material in our From Raw Materials mindset.​

✅ Real-time printing inspections (every 30 minutes):​

1. Ink adhesion test: Wrap sample around 500g weight, rub 20x on white paper—no ink transfer (adjust pressure/temp if needed; this ensures the print lasts from From Raw Materials to customer use).​

2. Printing accuracy: Use calipers to check logo-edge distance—tolerance ±0.5mm (avoids misprints hurting brand image; precision matters as much as From Raw Materials calidad).​

✅ “Safe distance” rule: Printed area ≥1cm from the bag’s inner surface (for direct bread contact—extends the From Raw Materials safety promise to the final design).​

✅ Extra protection for transparent PE bags: Add a food-grade film between ink and bread (prevents ink migration—another layer of safety in the From Raw Materials-to-finished process).​

💪 3. Pressure Resistance Testing: Durable for Real Life—Protecting the From Raw Materials Investment​

The durability of a bread bag depends not just on From Raw Materials calidad, but also on how well it holds up in real use. We simulate real scenarios to ensure the From Raw Materials effort doesn’t go to waste.​

✅ Use a computer-controlled pressure tester:​

1. Pick 50 random samples per batch (from different production line parts for fairness—we test the consistency of the From Raw Materials-to-production process).​

2. Seal bag openings (simulate full bread), apply gradual pressure:​

• Regular bags (500g-1kg bread): Withstand 200N (≈20kg weight) for 60s—no breaking/leaking (durability that honors From Raw Materials estándares).​

• Large bags (2kg+ bread): Withstand 300N (higher strength for heavier loads—built on reliable From Raw Materials).​

✅ Dynamic durability test (simulate delivery):​

1. Fill bags with sandbags (same shape/weight as bread—mimics real use of the From Raw Materials-made bag).​

2. Put in vibration tester (5Hz frequency, 10mm amplitude) for 2h (mimics truck bumps—tests if the bag stays intact after From Raw Materials and production).​

3. Check seams for damage/deformation—1 failed sample = batch on hold (fix material/sealing, retest until pass—we don’t let poor production undo From Raw Materials calidad).​

🔍 4. Beyond Key Links: Full-Lifecycle Quality—Completing the From Raw Materials to Finished Journey​

Our 360° process doesn’t stop at core steps—we check until the final bag to ensure the From Raw Materials-to-finished journey ends with excellence.​

✅ Finished product visual inspection:​

• Use light tables to spot 0.1mm pinholes (tiny holes = freshness loss—we catch this before the From Raw Materials-made bag reaches customers).​

• Check for uneven sealing or dirty marks (no flaws allowed in the final product of our From Raw Materials proceso).​

✅ Freshness retention test:​

• Put a bread slice in the bag, sello, store at 25°C for 3 days.​

• Ensure bread stays soft + no mold (tests airtightness/moisture control—proves the From Raw Materials and production work together to keep bread fresh).​
  

❤️ Why This Matters: From Raw Materials to Trust​

Quality control isn’t just procedures—it’s a mindset centered on From Raw Materials to finished excellence. Every bread bag connects bakeries to customers, so its safety and durability (rooted in From Raw Materials calidad) directly affect your brand reputation.​

If you’re a bakery owner/buyer, visit our factory! See our From Raw Materials almacenes, lab tests, and production checks firsthand—partner with a factory that builds quality from From Raw Materials to the very last bag.