IPC-6011 is the General Standard for bare boards (not assembled yet), 
IPC-6012 is specific to RIGID bare boards (other numbers for flex, HDI, etc)
IPC-A-600 is a VISUAL REFERENCE to help evaluate acceptability

I'm not sure I understand your question completely, but the hourglass shape is usually the effect of trying to plate a small diameter hole, and the acceptability is usually to specify a MINIMUM hole wall thickness, nothing related to the "shape" of the plating. (we allow our vias to be plated completely closed)

see IPC6012 Tables 3-4 and 3-5 for hole wall plating minimums, 
and 
see pictures in IPC-A-600 section 3.1, and specifically DESMEAR issues in 3.1.6

Jack

.

On Thu, 11 Feb 2016 20:05:38 +0000, Victor Hernandez <[log in to unmask]> wrote:

>Fellow TechNetters:
>
>   In the above stated standard DON"T see anything that refer to a defect from the desmear process which created a bow/flex, hour glass shape, on the copper hole wall from uncleansed debris.   No lead will be inserted in this PTH.   Is this type of anomaly acceptable.   I don't suspect that the laminate is FR4 at this time.   Perhaps later will identify.
>
>Victor,