Latest reviewed evidence
The Wool Testing Bureau S.A. 2023-24 schedule sets a 50-gram minimum sample for non-supervised mohair coring, a 300-gram minimum for supervised coring, an eight-core schedule for a one-bale lot and a 12,000-kilogram maximum greasy lot. The U.S. 1971 grease-mohair grade table and FAO length bands are explicitly historical references, not current universal trade grades or lot results. Each current offer still needs representative, traceable testing on its declared product form.
WTBSA non-supervised mohair minimum sample
50
grams, minimum · WTBSA fee and coring schedule effective 1 July 2023
WTBSA supervised mohair minimum sample
300
grams, minimum · WTBSA fee and coring schedule effective 1 July 2023
WTBSA maximum greasy lot weight
12000
kilograms, maximum · WTBSA fee and coring schedule effective 1 July 2023
WTBSA one-bale mohair coring schedule
8
cores per bale · WTBSA fee and coring schedule effective 1 July 2023
Historic U.S. 40s grease-mohair diameter lower bound
23.01
micrometres, inclusive lower bound · 1971 U.S. voluntary grease-mohair standards
Historic U.S. 40s grease-mohair diameter upper bound
25
micrometres, inclusive upper bound · 1971 U.S. voluntary grease-mohair standards
Historic FAO mohair length class A lower bound
125
millimetres, lower bound · FAO historical technical guidance
Angora-goat identity comes before fibre grade
The historic U.S. grease-mohair standard defines mohair as fiber from the Angora goat and grease mohair as fiber taken from living Angora goats. The name Angora can also refer to rabbit fiber in other contexts, while wool, cashmere and alpaca come from different animals and use different grading systems. Atlas records the declared species and breed, farm or production area, clip and shearing date, kid, young-goat or adult description where used, and supporting identity evidence before accepting a micron class or supplier grade.
Greasy, scoured, sliver, top, yarn and blend stay separate
Greasy mohair contains natural grease, dirt and other removable material; scouring changes saleable mass, while carding, combing and spinning create sliver, top and yarn with further conversion losses and specifications. Mohair South Africa's process description separates shearing, classing, scouring, carding, combing into top and spinning. Atlas retains gross and net mass, conditioned basis, clean yield, process stage, blend percentage, package and conversion evidence instead of comparing a greasy-kilogram observation directly with top or yarn.
Diameter, dispersion, length and yield require representative testing
WTBSA distinguishes non-supervised coring for mean fiber diameter from supervised coring for yield plus mean fiber diameter, requires every bale to be equally cored, sets sample masses and a maximum greasy-lot weight, and distinguishes a Test Report from a Mohair Test Certificate. IMLA promotes standardized objective measurement, inter-laboratory cooperation and calibration. Atlas records the sampling authority, lot and bale count, cores, sample mass, test method, laboratory, mean diameter, distribution or standard deviation, length, yield, kemp and contamination results and test date. The 1971 U.S. diameter table and FAO length bands remain dated technical references, never substitutes for current representative lot testing.
RMS certification and fibre quality answer different questions
Textile Exchange's Responsible Mohair Standard uses the Content Claim Standard chain of custody to preserve certified-material identity from farm through later organizations, with volume reconciliation, technical specifications and transaction certificates where required. Certification scope and a valid transaction chain do not themselves prove fiber diameter, length, yield, color, kemp, contamination or commercial value. Atlas keeps certification body, certificate holder, site and scope, validity dates, transaction certificate and certified volume separate from the exact lot's laboratory and inspection evidence.
A micron class or certificate does not establish a delivered mohair price
A 23.01-to-25.00-micrometre historical 40s band, an RMS claim or a laboratory certificate does not establish product form, actual clean yield, length, kemp, color, availability, transaction value or delivered cost. A physical comparison still needs permitted current observations for the exact greasy, scoured, sliver, top, yarn or blend form; test basis; quality results; certification scope; origin; quantity; package; currency; Incoterm; destination; delivery window; route costs and information vintage. Atlas withholds a physical estimate when those observations or usage rights are missing.