[78-L] RCA Victor reverse side "spider web" etching name?

[Michael Shoshani]

On Wed, 2009-01-07 at 15:43 -1000, Malcolm Rockwell wrote:
> Okay, then how about possible added structural integrity? Wouldn't a 
> disc with a design be less apt to break than one with a plain, flat side?

I would think just the opposite. The disc will be narrower in thickness
where the groove is, so if the disc suffers any shear stress at all,
that will be its weakest point.