On Sep 14, 9:35*am, "Ed Huntress" wrote:
"Ed Huntress" wrote in message

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"Denis G." wrote in message
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On Sep 13, 10:39 pm, The Dougster
wrote:
Hey, howdy, rcm.

I want to work with Gorilla Glue, lots of it. No more spray cans of
air-hardening cyano foam for me; That crap cures in the spary tube,
Yeah, I know all about the acetone trick. Schmoopie hates the smell
and it gets mighty cold outside, so it's a no-win.

Let's say I keep a pint or a quart of Gorilla Glue in the home
refrigerator where it's cold and dry, and I let it stand on the
counter overnight before any day I want to use it, so the temperature
is repeatable. Let's say I can measure volumes to 10 ml or weights to
1 gm, whichever is more appropriate the task. Let's say I scale my
projects to use up as much glue foam as I can make with one precious
drop of water.

So I am wondering how to find out:

To how much Gorilla Glue, by volume or weight, do I add *one drop* of
tap water with stirring for 1 minute by hand, for application within
the next 5 minutes, to get a foam that will end up in 24 hours, "not
completely unlike", that is, a reasonable match (in acoustic impedance
or machinability or density or stiffness per volume, pick one and say
why) for:

Styrene Foam?

Balsa?

Pine?

Oak?

Acetal?

Acrylic?

Magnesium?

Aluminum?

Mild Steel?

It's all about the damn futon. Friend gave it to us. I cut panels to
fit the rack-of-torture frame. I want to foam glue them. I want them
to stay. I don't want spray foam on the rug, or anywhere else. I want
some control. Yeah, caulk would work.

But then I got thinking...I used Gorilla Glue on the patio bricks and
they stayed put. You just have to keep it very dry, and never touch
the nozzle to anything. I know how to do that.

Here's a tougher question:

How would you dispense 1/10 drop of water?

Douglas (Dana) Goncz, CPS
Replikon Research
Seven Corners, VA 22044-0394

For U100 syringes used by diabetics, each unit is 10 microliters. *A
drop of water is 50 microliters. *To dispense 1/10th of a drop of
water use a 1/2 unit on a diabetic syringe.

Hey, here's something curious. I just tried this, and got funny little
drops, much smaller than I would get with an eyedropper, for example.

I took a 30-unit syringe, filled it with water, and counted the drops in 5
units. I got 11 drops -- close enough to 10 -- but they were really teeny..
These were drops that would detach themselves and free-fall as I held the
syringe point-down; just ordinary drops.

That's exactly 1/10 the size you're describing -- one drop from this syringe
is 5 microliters. I see from some references online that this is the same
size as a drop of water dispensed from a Pasteur micropipette.

So is the size of the drop that dependent on the opening from which they're
dispensed? This was a 30-guage needle. I'd have to mike it to see the size,
but it's *really* thin.

--
Ed Huntress- Hide quoted text -

- Show quoted text -

You're probably right on the difficulty of dispensing it accurately.
It was only a ballpark method with commonly available tools if you
didn't want the expense of buying a micropipetter. I suppose you
might be able to make your own micropipetter by attaching a dial
caliper to a syringe. To get real accuracy you probably need to
develop the art of dispensing small volumes or just get the right
tools.