Mark,
The scratches you describe are just blemishes and will not hurt your adhesion.  Many of these
scratches come from dragging the material across the lower sheet in the stack.
Chuck Brummer

Mark Hargreaves wrote:

> Hi All,
>      The double treat inner layer material we use often arrives with surface
> scratches - deep enough to be seen, but not deep enough to affect the
> underlying copper.  These scratches are visible on the finished boards.  Is
> this a cosmetic defect, or worse?  Is board performance affected?  Should
> our vendor be slipsheeting this material?  Which essential question have I
> forgotten to ask?
>
> Thanks in Advance,
> Mark Hargreaves
>
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