Lecture 7 Flashcards
(27 cards)
What is a fine wool breed
Merino
What is a fine x medium breed
Corriedale
What is a medium (fine x long) breed
Suffolk, Dorset, south down
What breed have long (course)
Romney, Boarder Leichter, Lincoln
What breed have carpet (double-coated) wool
Scottish blackface, Karakul, Icelandic
What breed have hair (shedding)
Katahdin, Dorper
What are the wool quality traits (6)
- Fibre diameter
- Staple strength
- State length
- Colour
- Vegetable matter
- Yield
Describe fibre diameter
Most important quality factor of wool, it is the single biggest determinant of price. Fine wool is more valuable than coarse
What is fibre diameter measured in
Microns
Breed to wool diameter
<19u - super fine merino 19u - fine marino 20-21u - medium merino 22-25u - strong merino 26u - fine crossbred 28-30u - medium cross bred 32-37u - coarse crossbred
What is crimp
Natural curl in wool fibre
What is the effect of staple length
Longer fibres are easier to spin into a yarn, whereas short fibres cannot. They undergo a different process producing an interior yarn to long fibre
Define staple length
Refers to the length go an unstretched lock of shorn wool
Define weak staple strength
Tender wool is weak and breaks due to poor nutrition or sickness
Define staple strength
Measure of the force required to break staple of wool
What is the second most important determinant of price
Staple strength
What is staple strength most important in
Fine wool
What is SS measured in
Newtons per kilotex
What is a kilotex
Thickness of one gram of wool stretched evenly over 1 metre
What does sound wool have a SS of
> 40N/ktex
What does tender wool have a SS of
<30N/ktex
Define vegetable matter
Any material of plant Origen found in the fleece
What is a dag
Wool with manure attached to it
What is skirting
Removing the stained, unusable or undesirable portions of a fleece
