ISO 5530-3:1988

Overview

ISO 5530-3:1988 specifies a laboratory method for determining water absorption and key rheological properties of doughs made from soft wheat (Triticum aestivum) flour using a valorigraph. Based on ICC Standard No.115, the method records dough consistency during hydration, development and breakdown to produce a valorigram from which water absorption (ml/100 g at 14% moisture), development time and degree of weakening are obtained. The standard applies to flours that give a maximum consistency up to 500 valorigraph units (UV).

Key topics and requirements

• Scope: Soft wheat flour; method uses a valorigraph to measure consistency during mixing and breakdown.
• Definitions: Consistency (in UV), water absorption (ml per 100 g of flour at 14% moisture), development time, degree of weakening.
• Apparatus: valorigraph (described in informative Annex A), two burettes for controlled water addition, precision balance (0.1 g), spatula, thermostatically controlled bath and chamber.
• Operating conditions:
  • Sample mass adjusted to give 50 g at 14% moisture (table provided in the standard).
  • Chamber air temperature controlled at about 30 ± 0.2 °C for testing; preheating and instrument oil temperature control also specified.
  • Fraseur (slow beater) speed ~64 min‑1; ratio between slow and fast beaters ~1.5.
  • Water added within a prescribed timeframe (addition made in ~25 s), with recorder speed and damping set to defined values.
• Calculations:
  • Water absorption is obtained from the volume of water added and corrected to a consistency of 500 UV (formula provided in the standard: v* = v + 0.016(c − 500)).
  • Results expressed to specified precisions (e.g., 0.1 ml for absorption; development time to 0.5 min; weakening to 5 UV).
• Precision data: Interlaboratory precision (repeatability/reproducibility) figures are reported in the standard for water absorption, development time and degree of weakening.

Applications and users

• Flour mills and quality control laboratories: routine quality grading and process control.
• Cereal scientists and R&D: characterizing flour functional performance for baking applications.
• Baking industry (technical development): selecting flours and formulating doughs with predictable mixing behavior.
• Standards bodies and accreditation labs: method reference for proficiency testing and method validation.

Related standards

• ISO 5530 series (same title):
  • Part 1 - farinograph method
  • Part 2 - extensograph method
  • Part 4 - alveograph method
• ICC Standard No.115 (method basis)

Keywords: ISO 5530-3, valorigraph, water absorption, dough rheology, wheat flour testing, dough development time, degree of weakening, flour quality.