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Haiyun Flour Milling Systems

Cluster article

Flour Specification by Application: Bread, Noodle, Biscuit, Cake and Atta

Target specifications for the main flour applications — protein, ash, moisture, granulation and rheology — and the wheat selection and milling adjustments each one requires.

By Haiyun engineering desk Updated 2026-11-07 9 min read

Key takeaways

  • Protein is set by wheat selection; you cannot mill low-protein wheat into bread flour.
  • Granulation matters as much as protein for noodle and biscuit flour.
  • Atta is a different product, not a grade of flour — 85–95% extraction with specific granulation.

Bread (pan / sandwich)

Parameter Target
Protein 11.5–13.0%
Ash 0.50–0.62%
Moisture 13.5–14.0%
Water absorption 58–62%
Development time 4–8 min
Stability 8–15 min
Granulation 90%+ through 200 mesh

Wheat: hard red winter or hard red spring, 11.5–13% protein. Milling: full 4B5M1S1T with purifier; patent streams blended for consistent protein.

Noodle

Parameter Target
Protein 10.0–11.5%
Ash 0.42–0.55%
Moisture 13.5–14.0%
Water absorption 60–64%
Granulation 85–95% through 200 mesh, minimal coarse fraction

Noodle flour needs low ash and fine, uniform granulation. Coarse particles produce speckled noodles and uneven hydration. Use purifier extensively and blend patent streams.

Parameter Target
Protein 8.0–9.5%
Ash 0.45–0.55%
Moisture 13.5–14.2%
Water absorption 50–54%
Development time 1–3 min
Stability 1–3 min
Granulation 80–90% through 200 mesh

Wheat: soft wheat, low protein, low damaged starch. Damaged starch is the hidden variable — biscuit flour needs low starch damage, which means gentle reduction and lower roll pressure.

Cake / pastry

Parameter Target
Protein 8.5–10.0%
Ash 0.40–0.50%
Moisture 13.5–14.0%
Water absorption 50–56%
Granulation Very fine, 95%+ through 200 mesh

Chlorination is used in some markets for cake flour to lower pH and improve crumb structure. Check local regulation before offering.

Steamed bread (Mantou)

Parameter Target
Protein 10.5–12.0%
Ash 0.50–0.65%
Moisture 13.5–14.0%
Granulation 85–95% through 200 mesh

Steamed bread tolerates medium protein and benefits from slight bran presence for flavour and colour. Medium-hard wheat.

Atta (whole wheat, South Asian)

Parameter Target
Protein 11.0–13.0%
Ash 1.20–1.80%
Moisture 13.0–14.0%
Extraction 85–95%
Granulation 70–85% through 200 mesh

Atta is not a grade of flour — it is a different product. The bran and germ are retained, granulation is coarser, and the milling process is often chakki-style (stone or attrition) rather than roller.

For 6FGP-series mills, the granular Atta produced is specifically suited to chapati and roti.

Durum / semolina

Parameter Target
Protein 12.5–14.5%
Ash 0.85–1.10% (semolina)
Granulation 250–600 µm, narrow distribution
Moisture 14.0–14.5%

Durum requires separate milling with higher tempering moisture (16.5–17.0%) and purifier-intensive flow to produce clean semolina.

The wheat-selection point

Application Protein needed Wheat class
Biscuit, cake 8.0–10.0% Soft wheat
Noodle, steamed bread 10.0–12.0% Medium / medium-hard
Pan bread 11.5–13.0% Hard wheat
Hearth bread 12.5–14.0% Hard spring
Pasta 12.5–14.5% Durum

Milling cannot add protein. It can concentrate it slightly through stream selection — patent streams run 0.2–0.5 points higher than the mill mix — but if the wheat is 9%, no flow sheet produces bread flour.

This is why wheat sourcing is a strategic decision, not a purchasing one.

Answers

Questions on this topic

Straight answers to the questions engineers and mill owners actually ask us during plant sizing. If your case is not covered, send the wheat specification and your target tonnage.

Ask an engineer →
What protein should bread flour have?
11.5–13.0% (N×5.7, 14% moisture basis) for pan bread, 12.5–14.0% for hearth and high-protein breads.
What is the difference between Maida and Atta?
Maida is refined white flour at 72–76% extraction with low ash (0.45–0.58%). Atta is whole wheat at 85–95% extraction with high ash (1.20–1.80%) and coarser granulation.

Next step

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Send us: daily capacity target, wheat type and quality, available building dimensions, and local power supply. We reply within 12 working hours with a preliminary flow sheet, equipment list and budget range — no obligation.