[Jacob-list] Crimp and micron counts

[Linda]

Just to clarify - when you say standard deviation, you are talking about the deviation within the lock/s sent to be micron tested, aren't you?   Not the deviation of the entire fleece from neck to britch?  What's a large standard deviation - in microns?  

Linda
 
www.patchworkfibers.com
Registered Jacob Sheep, Angora Rabbits, Handspun Yarn



> Betty and I have been round and round on this a couple of dozen

> times. there are a few things to keep in mind, especially if you

> are sending off samples for micron counting.

>

> Jacob sheep have crimp in the fleece, but shouldn't have defined

> fleece crimp. The difference is that in order to have defined

> fleece crimp, the fleece has to be rather uniform. That is, there

> is very little variation within the fleece in micron diameter. A

> Corriedale and a Jacob may well have the same Average Micron

> Diameter, but the standard deviation figure in the micron count

> should be greater for a Jacob's fleece. A coarse fleece may well

> have a low std. dev. and have defined fleece crimp AND fell like

> brillo.

>

> A fleece with TOO large a std.dev. is likely a double fleece. This

> will show up in the graph of fibers from the sample as two

> overlapped bell curves.

>

> If I had a preference, I would like to see us set a range for Std.

> dev. if we set a range for AMD.

>

> Neal


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