Black printing on secondary

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: aric-at-despammed-dot-com 

I have obtained a phenolic impregnated cardboard tube to use as secondary 
for a small TC.  The tube is 3" dia.  The exterior is natural color, but 
the interior of the tube is imprinted with the logo of the manufacturer, 
and the printing is black.  Has the presences of black printing on the 
interior surface of secondary coilforms caused problems for coilers in 
practice?  I could make up a sanding jig attached to a power drill to grind 
away to printing if I have to, but I'd rather skip the effort and weakening 
of the tube if it can be safely avoided.

Thanks!
Aric