Quote:
Originally Posted by Jellby
On the other hand, anything thick enough, even paper or styrofoam, can reduce the effect not by weakening or diverting the field, but by simply increasing the distance. As far as I know, magnetic effects are quite sensitive to distance (and anyone who plays with magnets can experience that), so a tiny increase in the distance between the cover magnet and the reader can make a difference.
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The problem is that I need 3/16" distance to weaken it enough.