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Cashmere and Camel Hair Manufacturers Institute

Definition of Superfine Wool

The International Wool Textile Organization has codified fabric quality definitions relating to the use of "Super S" and "S" descriptions, stating:

Fabric Labelling Code of Practice: Quality Definitions Relating to "Super S" and "S" Description

Pure Wool Fabrics

The word SUPER (as in SUPER 100s for example) can only be used to describe fabrics made from pure new wool, and the "Super S" value is determined by, and must comply with, the Maximum Meam Fibre Diameter values in the following fable:

"Super S" Value
Maximum Mean
Fibre Diameter
of Wool
"Super S" Value
Maximum Mean
Fibre Diameter
of Wool
SUPER 80s
19.75 mm
SUPER 170s
15.25 mm
SUPER 90s
19.25 mm
SUPER 180s
14.75 mm
SUPER 100s
18.75 mm
SUPER 190s
14.25 mm
SUPER 110s
18.25 mm
SUPER 200s
13.75 mm
SUPER 120s
17.75 mm
SUPER 210s
13.25 mm
SUPER 130s
17.25 mm
SUPER 220s
12.75 mm
SUPER 140s
16.75 mm
SUPER 230s
12.25 mm
SUPER 150s
16.25 mm
SUPER 240s
11.75 mm
SUPER 160s
15.75 mm
SUPER 250s
11.25 mm

The Test Methods to determine the Mean Fibre Diameter values are noted in the Regulation defining the Code of Practice.

Regulations

Regulatory procedures controlling the operation of this Code of Practice are published in the White Book of IWTO Regulations.


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