By eliminating thermals at via locations you significantly increase 
     the probability of creating pink ring.  Depending on who you talk to 
     will determine if pink ring is a functional defect or not.  If your 
     finished specification for your board manufacturer states "No pink 
     ring allowed" you are setting him up for failure.  If pink ring is a 
     non issue with your company and this is reflected in your 
     specification this is a non issue.  The diameter of the center pad, 
     width of the spokes and diameter of the clearance around the center 
     pad are significant factors that contribute to the amount of pink ring 
     present.



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