What's that white stuff?

[J M Fahey]

Chromate

Yes, depending on date.
VERY popular in 70s80s Japanese electronics chassis was later forbidden on cancer causing grounds, typical was varying hues of greenish reddish areas which I found pretty.

Later replaced by zinc plating, which was original bluish silver surface, later they invented a further "passivating" bath which made it take a reddish golden hue, quite similar to chromate, but environmentally safer.

Here stacked raw frames, both types :

Then 2 of my speakers, left one passivated "blue" the right one passivated ersatz "chromate type" .

Lately I use bluish silver finish, simply because Customers associate that with Celestion which uses the same, hence "quality"
Oh well.

Fact simply is that bluish white zinc is the *cheapest* steel finish available, period

[SoulFetish]

Hantavirus pills.

HAHA!