ASTM D2252-05(2009)
Standard Specification for Fineness of Types of Alpaca

Standard No.

ASTM D2252-05(2009)

Release Date

2005

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D2252-18

Latest

ASTM D2252-18

Scope

This specification for fineness is intended as a guide for production, preparation, and marketing (Note 1) by comparing the average fiber diameter of a measured specimen with the fineness specifications for the various types listed in Table 1. The standard deviation which expresses measured variability of a specimen may be compared with the average shown in Table X2.1.

Note 18212;Test Method D 2130 does not include any values for the precision to be expected in the testing of alpaca fibers. In an interlaboratory test in which six laboratories each made one test on each of six type samples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB, HLPB-CL, and HSKB-CL, the coefficient of variation of the average fiber diameters between laboratories, including test variation, was 3.2, 4.7, 3.8, 4.5, 2.2, and 0.93 % for the respective alpaca types.

TABLE 1 Fineness Specifications for Types of Alpaca

	Type	Average Diameter, μm
	T Extra	under 22.00
	T	22.00 to 24.99
	X	22.00 to 24.99
	AA	25.00 to 29.99
	A	30.00 to 35.99
	SK	over 30.00
	LP	over 30.00

1.1 This specification is applicable in the classification of alpaca into types according to fineness.

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

ASTM D2252-05(2009) Referenced Document

• ASTM D123 Standard Terminology Relating to Textiles
• ASTM D2130 Standard Test Method for Diameter of Wool and Other Animal Fibers by Microprojection
• ASTM D4845 Standard Terminology Relating to Wool

ASTM D2252-05(2009) history

• 2018 ASTM D2252-18 Standard Specification for Fineness of Types of Alpaca
• 2005 ASTM D2252-05(2009) Standard Specification for Fineness of Types of Alpaca
• 2005 ASTM D2252-05 Standard Specification for Fineness of Types of Alpaca
• 2005 ASTM D2252-96(2005) Standard Specification for Fineness of Types of Alpaca
• 1996 ASTM D2252-96 Standard Specification for Fineness of Types of Alpaca