What is Micronaire or MIC In Cotton? 

What is Micronaire or MIC In Cotton

The cotton industry utilizes Micronaire (often abbreviated as MIC) as a measurement to evaluate the fineness and maturity of cotton fibers. It specifically gauges the air permeability and the fineness of the fibers within a cotton sample. This measurement is crucial in determining the quality of cotton as it influences the spinning performance and the resulting yarn strength and texture in textile production. Generally, a lower Micronaire value indicates finer and more mature fibers, while higher values suggest coarser or less mature fibers.

Testing Procedure of MIC

The Micronaire instrument measures the Micronaire value of cotton fibers. This instrument evaluates the air permeability through a sample of cotton fibers. Here’s a simplified overview of the process:

  1. Sample Preparation: A representative sample of cotton fibers is collected and prepared for testing. This sample is usually taken from a larger batch or bale of cotton.
  2. Testing with Micronaire Instrument: They place the prepared sample into the Micronaire instrument. The instrument measures the airflow resistance as the air passes through the sample.
  3. Calculation: Based on the airflow resistance and other factors, the Micronaire value is calculated by the instrument or can be derived using specific formulas.
  4. Interpreting Results: The Micronaire value obtained indicates the fineness and maturity of the cotton fibers in the sample. This information is crucial for textile manufacturers to determine the suitability of the cotton for spinning and to predict the quality of the resulting yarn.

The Micronaire test helps in grading cotton and is an essential factor in assessing its spinning characteristics and determining its market value.

What is MIC G0

MIC G0 is the classification of cotton when its Micronaire value falls below 2.4.

What is MIC G1

MIC G1 is the label of micronaire between the range of 2.5 to 2.6. 

What is MIC G2

G2 MIC range is 2.7 to 2.9

What is MIC G3

The classification MIC G3 is for cotton with a Micronaire value falling within the range of 3.0 to 3.2.


MIC G4 designates cotton with a Micronaire value ranging between 3.3 to 3.4.

What is G5 MIC

The standard range for high-quality cotton Micronaire typically spans from 3.5 to 4.9.

What is G6 MIC

Cotton falling within the Micronaire value range of 5.0 to 5.2

Description of MIC g6

MIC G7 is the designation for cotton when its MIC value reaches 5.3 or higher.

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