Re: [ARSCLIST] Ampex 456 - tip of the iceberg...chemistry

[Lou Judson <loujudson@xxxxxxx>]

Thanks very much for this considered postin, Richard. In the late 70s 
we were using Shamrock 7" castoffs, and it seemed that some of it was 
backcoated and some was not, as a manufacturing defect as the oxide 
looked ad performed the same to our untrained ears. Would it be helpful 
if I could ghet some samples like this? I'm not sure I can, and not 
assurance that it was a similar batch if so, but it has me wondering...

Lou Judson • Intuitive Audio
415-883-2689

On Jun 16, 2006, at 5:05 PM, Richard L. Hess wrote:

> We can create a hypothesis that back-coating in contact with binder 
> has a catalytic effect on the degradation of the binder.