As woodworkers, we all have plenty of experience with glue. Here is a
video I stumbled over that is somewhat entertaining, and gives you
something to do while the Government has you bent over clenching your
buttocks and wringing your hands over the cold virus.

My personal experience with glue is long and extensive, and I can say
with confidence that my experiences have (almost) always exceeded my
expectations.

This video has one overwhelming flaw which I'll keep to myself,
wondering who else will notice, or rather who won't notice...

https://www.youtube.com/watch?v=_vIszsybR4M
--
Jack
Tolerance is the virtue of the man without convictions.

On Wednesday, April 22, 2020 at 9:40:58 AM UTC-4, Jack wrote:
As woodworkers, we all have plenty of experience with glue. Here is a
video I stumbled over that is somewhat entertaining, and gives you
something to do while the Government has you bent over clenching your
buttocks and wringing your hands over the cold virus.

My personal experience with glue is long and extensive, and I can say
with confidence that my experiences have (almost) always exceeded my
expectations.

This video has one overwhelming flaw which I'll keep to myself,
wondering who else will notice, or rather who won't notice...

https://www.youtube.com/watch?v=_vIszsybR4M
--
Jack
Tolerance is the virtue of the man without convictions.

I didn't watch to the finale, but it appears the center of gravity of the load was not consistent. Particularly evident during the epoxy/miter test...

The plywood is coming apart. The glue is good

On 4/28/2020 4:35 AM, wrote:
On Wednesday, April 22, 2020 at 9:40:58 AM UTC-4, Jack wrote:
As woodworkers, we all have plenty of experience with glue. Here is a
video I stumbled over that is somewhat entertaining, and gives you
something to do while the Government has you bent over clenching your
buttocks and wringing your hands over the cold virus.

My personal experience with glue is long and extensive, and I can say
with confidence that my experiences have (almost) always exceeded my
expectations.

This video has one overwhelming flaw which I'll keep to myself,
wondering who else will notice, or rather who won't notice...

https://www.youtube.com/watch?v=_vIszsybR4M
--
Jack
Tolerance is the virtue of the man without convictions.

I didn't watch to the finale, but it appears the center of gravity of the load was
not consistent. Particularly evident during the epoxy/miter test...

On that test, she had I believe 75 lbs on the joint, but the text in the
video said 409 lbs. She was saying the weight correctly, but the text
was grossly off by a lot. The tests were interesting anyway,and while
not scientifically accurate, close enough for government work...

--
Jack
Tolerance is the virtue of the man without convictions.

On 4/28/2020 9:29 AM, Mark H wrote:
The plywood is coming apart. The glue is good

This was accounted for in the video, and all glues didn't past muster.
She also tested solid wood. I was surprised by the mitered joints and
how they held up, particularly with epoxy.

Also surprised by how pre-gluing or sizing the edge grain miter joints
didn't help at all. I had read sizing mitered picture frames would
greatly strengthen the joints, and was planning on doing that the next
time I make picture frames even though I have a 100% success rate w/o
doing that. Typically, I just glue them and clamp them with my pin nailer.

--
Jack
Tolerance is the virtue of the man without convictions.

On Tue, 28 Apr 2020 10:39:35 -0400, Jack wrote:

On 4/28/2020 4:35 AM, wrote:
On Wednesday, April 22, 2020 at 9:40:58 AM UTC-4, Jack wrote:
As woodworkers, we all have plenty of experience with glue. Here is a
video I stumbled over that is somewhat entertaining, and gives you
something to do while the Government has you bent over clenching your
buttocks and wringing your hands over the cold virus.

My personal experience with glue is long and extensive, and I can say
with confidence that my experiences have (almost) always exceeded my
expectations.

This video has one overwhelming flaw which I'll keep to myself,
wondering who else will notice, or rather who won't notice...

https://www.youtube.com/watch?v=_vIszsybR4M
--
Jack
Tolerance is the virtue of the man without convictions.

I didn't watch to the finale, but it appears the center of gravity of the load was
not consistent. Particularly evident during the epoxy/miter test...

On that test, she had I believe 75 lbs on the joint, but the text in the
video said 409 lbs. She was saying the weight correctly, but the text
was grossly off by a lot. The tests were interesting anyway,and while
not scientifically accurate, close enough for government work...
I think the text was the calculated load on the joint itself - taking
into account the mechanicaladvantage of the moment arm - - -

On Tue, 28 Apr 2020 10:52:03 -0400, Jack wrote:

On 4/28/2020 9:29 AM, Mark H wrote:
The plywood is coming apart. The glue is good

This was accounted for in the video, and all glues didn't past muster.
She also tested solid wood. I was surprised by the mitered joints and
how they held up, particularly with epoxy.

Also surprised by how pre-gluing or sizing the edge grain miter joints
didn't help at all. I had read sizing mitered picture frames would
greatly strengthen the joints, and was planning on doing that the next
time I make picture frames even though I have a 100% success rate w/o
doing that. Typically, I just glue them and clamp them with my pin nailer.
The diluted glue used for "priming" the joint left a low strength
"boundary" layer separating the full strength glue from the wood
fibers. PERHAPS letting the prime coat cure before applying the full
strength glue and assemblingthe joint MAY have improved the results

On 4/28/2020 1:21 PM, Clare Snyder wrote:
On Tue, 28 Apr 2020 10:52:03 -0400, Jack wrote:

On 4/28/2020 9:29 AM, Mark H wrote:
The plywood is coming apart. The glue is good

This was accounted for in the video, and all glues didn't past muster.
She also tested solid wood. I was surprised by the mitered joints and
how they held up, particularly with epoxy.

Also surprised by how pre-gluing or sizing the edge grain miter joints
didn't help at all. I had read sizing mitered picture frames would
greatly strengthen the joints, and was planning on doing that the next
time I make picture frames even though I have a 100% success rate w/o
doing that. Typically, I just glue them and clamp them with my pin nailer.

The diluted glue used for "priming" the joint left a low strength
"boundary" layer separating the full strength glue from the wood
fibers. PERHAPS letting the prime coat cure before applying the full
strength glue and assembling the joint MAY have improved the results

I think you may be right on that.
--
Jack
Tolerance is the virtue of the man without convictions.

On Tue, 28 Apr 2020 17:58:55 -0400, Jack wrote:

On 4/28/2020 1:21 PM, Clare Snyder wrote:
On Tue, 28 Apr 2020 10:52:03 -0400, Jack wrote:

On 4/28/2020 9:29 AM, Mark H wrote:
The plywood is coming apart. The glue is good

This was accounted for in the video, and all glues didn't past muster.
She also tested solid wood. I was surprised by the mitered joints and
how they held up, particularly with epoxy.

Also surprised by how pre-gluing or sizing the edge grain miter joints
didn't help at all. I had read sizing mitered picture frames would
greatly strengthen the joints, and was planning on doing that the next
time I make picture frames even though I have a 100% success rate w/o
doing that. Typically, I just glue them and clamp them with my pin nailer.

The diluted glue used for "priming" the joint left a low strength
"boundary" layer separating the full strength glue from the wood
fibers. PERHAPS letting the prime coat cure before applying the full
strength glue and assembling the joint MAY have improved the results

I think you may be right on that.
Back in the hot hide glue days priming was VERY common. You filled the
end grain, in particular, with glue and let it set - on both surfaces
- then added a "filling" to the sandwich and assembled the joint.

On 4/28/2020 12:21 PM, Clare Snyder wrote:
On Tue, 28 Apr 2020 10:52:03 -0400, Jack wrote:

On 4/28/2020 9:29 AM, Mark H wrote:
The plywood is coming apart. The glue is good

This was accounted for in the video, and all glues didn't past muster.
She also tested solid wood. I was surprised by the mitered joints and
how they held up, particularly with epoxy.

Also surprised by how pre-gluing or sizing the edge grain miter joints
didn't help at all. I had read sizing mitered picture frames would
greatly strengthen the joints, and was planning on doing that the next
time I make picture frames even though I have a 100% success rate w/o
doing that. Typically, I just glue them and clamp them with my pin nailer.
The diluted glue used for "priming" the joint left a low strength
"boundary" layer separating the full strength glue from the wood
fibers. PERHAPS letting the prime coat cure before applying the full
strength glue and assemblingthe joint MAY have improved the results


Typically glues does not adhere well to cured glue.

https://www.youtube.com/watch?v=k-g3efGa3sI