More LED's - Again

RST Engineering (jw) wrote:
The secret is HIGH GLOSS, LOW QUALITY photo paper. The high gloss means
that the toner won't diffuse into the pores of the paper and the low quality
means that the backing paper will soak off easily in hot sudsy water.

I can hold long 10 mil lines and 10 mil gaps with relative ease.

MUCH easier than press-n-peel.

Jim




Well, you da man, Jim.

I'll give it a try.


http://www.home.earthlink.net/~tp-1/rcatest.jpg

Not as crisp as the original tiff file, but...

The Sealing of anodized aluminum is very simple... Steam!


"RST Engineering" wrote in message
.. .

"flybynightkarmarepair" wrote in message
oups.com...

RST Engineering wrote:

Now you can etch the board in the usual way.

Or you can use the new, improved way without that nasty ferric chloride.
Plain old swimming pool etchant (muriatic acid -- 28% HCl) from the home
store plus plain old hydrogen peroxide (3%) from the drug store mixed
2:1
respectively does an admirable job at room temperature. Plus, when you
get
done, you have metallic copper (not a hazmat), hydrochloric acid (not a
hazmat), and the hydrogen peroxide which, within half an hour, has
broken
down into oxygen (which has escaped into the air) and water. If you
want to
be totally environmentally friendly, you can neutralize the HCl with
baking
soda ($5.99 for ten pounds at the Charlie's Club places) before pouring
it
down the sink.

Ferric Chloride may be safer than Muratic Acid

http://www.artmondo.net/printworks/articles/ferric.htm
Spent ferric chloride can be neutralized with soda as well.

Plus, I THIINK Ferric Chloride is the commonly available de-smuting
solution you need to anodize 2000 series aluminum.

For dyeing anodized aluminum, try RIT, or page through this catalog:
http://dharmatrading.com/html/eng/2934904-AA.shtml Sealing, I guess
you'll have to use clear lacquer.

You mean like holding it over a pan of boiling water on the kitchen stove?
How long in time?

Any more details or a point to a url?

Jim


"Cy Galley" wrote in message
news:AXzTf.39602$oL.16416@attbi_s71...
The Sealing of anodized aluminum is very simple... Steam!

The steam method is how ALCOA found out that steam seals the anodizing.
Seems they had plain anodized cafeteria trays. Coffee would be spilled on
the tray. The coffee stain could be washed off most except for a few.
Alcoa was perplexed until they found that if the tray was set over the steam
table, then the coffee stain became permanent. Got this from an ALCOA movie
when I was trying to teach science to non-believers.


--
Cy Galley - Chair,
AirVenture Emergency Aircraft Repair
A Service Project of Chapter 75
EAA Safety Programs Editor - TC
EAA Sport Pilot
"RST Engineering" wrote in message
...
You mean like holding it over a pan of boiling water on the kitchen stove?
How long in time?

Any more details or a point to a url?

Jim


"Cy Galley" wrote in message
news:AXzTf.39602$oL.16416@attbi_s71...
The Sealing of anodized aluminum is very simple... Steam!

"Cy Galley" wrote in message
news:qaLTf.836270$x96.260249@attbi_s72...
The steam method is how ALCOA found out that steam seals the anodizing.
Seems they had plain anodized cafeteria trays. Coffee would be spilled on
the tray. The coffee stain could be washed off most except for a few.
Alcoa was perplexed until they found that if the tray was set over the
steam
table, then the coffee stain became permanent. Got this from an ALCOA
movie
when I was trying to teach science to non-believers.

So if it was steam sealed, and coffee got spilled on it, then steamed after
the spill, would the coffee wash off of it?
--
Jim in NC

Yes, After steaming, it would not stain


"Morgans" wrote in message
...

"Cy Galley" wrote in message
news:qaLTf.836270$x96.260249@attbi_s72...
The steam method is how ALCOA found out that steam seals the anodizing.
Seems they had plain anodized cafeteria trays. Coffee would be spilled
on
the tray. The coffee stain could be washed off most except for a few.
Alcoa was perplexed until they found that if the tray was set over the
steam
table, then the coffee stain became permanent. Got this from an ALCOA
movie
when I was trying to teach science to non-believers.

So if it was steam sealed, and coffee got spilled on it, then steamed
after
the spill, would the coffee wash off of it?
--
Jim in NC

"Cy Galley" wrote

Yes, After steaming, it would not stain

Cool! Now, there is some information (like a transmission jack) that I can
use! g

It makes you wonder why anyone would put on any sealer, that could just chip
off, later.
--
Jim in NC