Conservation amidst Alt Processing

"Seems to me I recall you using a residual hypo test - or was it somebody else? If you do, what color do you get?"

Somebody else, I guess. The point is, that running water does not increase the rate of which chemicals leave the paper. The rate of diffusion between fresh, running water, and the water of the 5th bath is probably not significant, since the concentration of chemicals in the 5th bath is so low (if the concentration is so low that it can not be found in testing the water, then the same will hold with the paper.). So if one ran a running water bath after the 5th standing bath, one might as well just do instead another standing water bath in place of the running water bath.

And while I did not mention it, I do a one minute rinse in running water after fixing, a tray of Kodak HCA, then a minute running water rinse, then start washing.

Vaughn

Vaughn said:

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I find it interesting comparing the SLC rain data I linked to above, and the perception of those who live there. I suppose even if SLC gets an inch of rain every month, when it is such low humidity it must evaporate right after hitting the ground and not soak in. So different from here!

Vaughn

Click to expand...

The data also probably incorporates precipitation in the alpine altitudes where very few persons (per capita) live. The Salt Lake valley is a desert ringed by mountains, some pushing 11,000 feet. The mountains receive much higher rates of precipitation, including much of the water that evaporates from the valley as the air is forced up the mountains and cooled. In the winter, the heavy snows that result in the mountains from evaporated lake water are termed "lake effect snow".

To illustrate the difference, yesterday we finally got about 4 inches of snow. Snowbird, twelve miles east of me has 96.

That might explain it. But the data below is based at the airport..so it depends on where the airport is, relative to most of the city. I suppose that the summer rains are monsoon thunderstorms which can be quite spotty. And I imagine your winter snows are a bit dry -- low in moisture, so a lot of snow does not equal a lot of precipitation.

Jan...Feb...Mar...Apr...May..Jun..Jul..Aug...Sep..Oct..Nov...Dec
3.23 4.89 3.97 4.90 4.76 3.84 2.57 3.66 7.04 3.91 3.34 4.37 Record Precipitation in.
1.37 1.33 1.91 2.02 2.09 0.77 0.72 0.76 1.33 1.57 1.40 1.23 Average Precipitation in.

You gotta be careful be careful where the rain gauge is! A local coastal community expanded and many home lots put in, with drainage and culvert sizing determined by the closest official data collection location (Humboldt Bay, which averages 42 inches or so). Shelter Cove, where this project was, in reality gets up to 100 inches a year. To say the least, many of the culverts blew out, and many of the lots ended up in the ocean!

Vaughn

Interesting, the airport is in the low part of the valley, up against the lake. In other words, a dry area.

Vaughn said:

The point is, that running water does not increase the rate of which chemicals leave the paper.
Vaughn

Click to expand...

This is really valuable information. Thanks. I'll put it into my mill and see what comes out. much appreciation - as usual.

L.

JBrunner said:

Interesting, the airport is in the low part of the valley, up against the lake. In other words, a dry area.

Click to expand...

I can see this as being a matter of perception of the amount of precipitation. A summer thunderstorm drops a quarter inch of rain in a short period -- the streets are dry, then wet, then dry again within minutes. To those inside at the time, it might have seemed not to have rained at all.

Snow on the other hand sticks around. But it takes (on the average) 10 inches of snow to equal an inch of rain...and this figure for snow can vary from about 3 inches to 30" of snow to equal 1" of rain. So if SLC gets a foot of dry snow, that might be less water (precipitation) than in a big thunderstorm in the summer.

Precipitation measurements are in inches of rain, plus inches of water in the snow (not the depth of the snow).

Today, we have snow flakes coming down mixed in with the rain -- at sea level here in northern CA. I did not ride my bicycle to work today.

Vaughn