wrote in message
Nicholas O. Lindan wrote:
From the above 100 8x10's produce 0.5 oz of silver.
Give or take very little, by far most projection speed
papers contain on average 1.6 grams silver per square
meter; 20 8x10s. Total, 8 grams or a 1/4 plus oz per
100. That is if none of the silver has been turned
to image silver. Dan

Sounds copacetic, I'm sure the silver recovery
folks were being as generous as possible ...

So, more realistically:

1/8 oz of silver/100 sheets 8x10 [1/2 the silver in the image]
120 8x10 sheets / gallon fix
1 gallon fix / week
50 wks / year

= 7.5 oz / year recovered silver at 1 gal/wk of fixer consumption,
manufacturer claimed "30 - 50 oz".

In any case it stops silver salts from entering whatever it
is one's drains empty into.