On Thu, 03 Nov 2011 20:56:23 -0700,
mko...@gmail.com wrote:
>On Thu, 03 Nov 2011 03:20:34 -0700, Larry Jaques
><
lja...@invalid.diversifycomm.com> wrote:
>
>[...]
>
>>> Nah, the bubbles just don't go near the anode. I suspect the poor
>>
>>I think I was referring to any electrical characteristics of the
>>electrolyte may have, wondering if it equated to bubble (or potential
>>bubble) size. I know that there are shadings in solution, so parts not
>>directly in line will have different etch characteristics. Jeeeze, I
>>haven't done any etching in a couple dozen years, and even then, it
>>was plating. <g>
>
>From my careful scientific observation: Mo' current, mo' bubbles.
A truly "Duh!" moment, was it?
>>>result on Plate 5 was because the precipitate was holding the bubbles
>>>in the electrolyte and they got closer to the anode. Although plate 4
>>>was closer to the cathode the electrolyte was clear and the bubbles
>>>were free to escape.
>>
>>What precipitate? The etched material?
>
>Ferric Hydroxide. Some ferrous too I think. When the acetate is used
>up the iron begins to precipitate. If you omit the vinegar it happens
>right at the start.
OK.
>>>Tomorrow I am going to look at a container big enough and narrow
>>>enough to do some of the bigger pieces side-by-side so there is enough
>>>space between the electrodes yet I do not have to use a gallon of
>>>electrolyte every time.
>>
>>Is this entirely sacrificial, or can you reuse electrolyte?
>
>CuSO4 I re-use all the time. Just top up the wastage and evaporation.
>Salt and vinegar needs to be fresh for the reasons above.
Cool. That's an inexpensive bath.
Those pretty blue crystals are good for poison oak/ivy, too. Make a
solution and pad it on the affected area. It'll make your skin crawl
for a few minutes but it removes the oil, the itch, and the spread.
I haven't noted any toxic feeling afterward, but it's a 1-time bath.
>>>Anyway, I moved onto brass today which I thought I had pretty much
>>>worked out. I did two small plates and observed some really weird
>>>behavior. OTOH I do not care as long as the result is OK.
>>
>>Got eight-by-ten colour glossy photographs with circles and arrows and
>>a paragraph on the back of each one explaining what each one was to be
>>used as evidence against us?
>
>You lost me there. Something to do with Mchael Jackson perhaps?
Newp, I don't have anything to do with the Jacksons, ever.
We must have hit the cultural divide between our countries.
Arlo Guthrie's song "Alice's Restaurant" is a cult classic here in the
States. Listen to it and weep:
http://goo.gl/qsb8K
Another cultured fave is "The Motorcycle Song"
http://goo.gl/Scw2p
"I don't want a pickle. Just wanna ride on my motorsickle."
OBTW, this is folk culture, not opera or symphony or sumpin'.
--
The unexamined life is not worth living.
--Socrates