Agtron color and calibration

Key Concepts

• Agtron Color Measurement:

• Agtron meters quantify the roast color of coffee using reflectance or light transmission.

• Values typically range from 0 (very dark) to 100 (very light), depending on the scale (G or Q scale).

• Provides an objective metric to complement visual assessment.

• Calibration:

• Essential to ensure accurate, repeatable readings.

• Use standardized calibration tiles or reference samples.

• Regularly check meter consistency, especially after relocation or extended use.

• Application in Roast Profiling:

• Track color changes during roasting to match desired roast levels (light, medium, dark).

• Compare batches to ensure uniformity across roasts.

• Combine with sensory evaluation to validate target profiles.

• Best Practices:

• Measure beans immediately after cooling to reduce variability.

• Record Agtron values in roast logs alongside DTR and RoR data.

• Train team members on proper handling and measurement techniques.

• Impact on Quality Control:

• Consistent Agtron readings help maintain brand identity.

• Early detection of roast deviations allows corrective adjustments before packaging.

Summary

Agtron meters are a vital tool for objective roast color measurement. Proper calibration and consistent measurement practices ensure repeatable roast profiles and reliable quality control.

• Tags:
• Best Practices
• Key Concepts
• Quality Control
• Roast Profiles
• Sensory Evaluation
• Roast Levels
• Brand Identity
• Medium Dark
• Light Medium
• Desired Roast
• Roast Profiling