knife adjustments/wrinkly sections

From:louise renton

Hi all,

This is a minor problem that I am encountering.
I am trying out a new PMMA resin and have come upon a strange problem when 
cutting sections. They are sort of wavy, not the sort of wrinkles that  one 
would expect with a dull knife. Is this perhaps due to knife angle? It just 
doesn't look like standard compression. (We have 2 sorts of tungsten carbide 
knives - 40 and 50 deg.Am I supposed to compensate the knife angle 
adjustment between the 2 sorts?)

Hoping for some clarification

Louise Renton
Bone Research Unit
South Africa
Tel & fax +27 11 717 2298
"Time flies like an arrow, fruit flies like a banana"

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