Rotory Blade Sharpness Question

[woodythx138]

Hello all,My name is Chris and I work for a Automation company and I build all the rotory cut modules that typically cut 50 blood glucose test strips. The unit has two shafts that are stacked and they have a .020 engagment. The blades are a H design and are each about .2165 or 5mm thick with a major and minor side to each blade. The major side has the cut side which is typically a 12 degree or 15 degree single edge deal. So the blades are rockwell 60-62 and are lapped to within 50 millionths and stacked 51 blades to a shaft this gives a .020 engagement, so my question is they machine a blank blade , rough machine it to 3.055 and then harden it and then lap it to size , then send it to a OD Grind house and they put the final OD in place, it comes to me and I have to stone the top cut side with a fine stone to remove the burr, so my burning question is this, should it be razor sharp at this point or does the angle have anything to do with it ? rather it's a 90 degree or 15 degree , shouldn't it be very sharp were the two points intersect ? The buyer at here were I work says you cannot get a 12 degree or 15 degree or 90 degree blade to be sharp? my problem is they used to cut the heck out of my fingers when I stacked each shaft. Thanks for any advice I can get.
Chris