On 11/22/2017 02:52 PM, Tom Gardner via cctalk wrote:
> The following answer comes from a retired IBM tape technologist:
>
> The color of the coatings on a tape are dominated by the magnetic pigment (or
> the carbon used in back coats..which is black)..the earliest iron oxide
> coatings were ba
Hi:
The following answer comes from a retired IBM tape technologist:
The color of the coatings on a tape are dominated by the magnetic pigment (or
the carbon used in back coats..which is black)..the earliest iron oxide
coatings were based on the conversion of alpha-iron oxide which is a pale
y
