Hi guys, some not every day advices needed

Microtome is device that is used to cut very thin pieces of tissue. That samples of tissue are then looked under a microscope (more info on wiki).

Recently I was given a blade from microtome (from veterinary lab) to sharpen it. Here are the pictures:









As you can se it is simply a over sized wedge razor. Dimensions: length: 21 cm, width: 1 cm and height around 3,5 cm.

Problem with a blade is that it is dull and cannot be resharpened by technicians in the lab.

It has uneven and too big secondary bevel. Back of the blade has 1 mm sori and flat primari bevels are not that really flat (on flat glass surface, they tilt a bit - around 0,25 mm).

I have some general idea what to do but If someone had similar case of repairing or knows more about this and it is willing to share it I would appreciate it very much, especially before I start removing large amounts of metal.

Thank you for reading.