From: Stunt Engraver (DGL) [#1]
9 Oct 2006
To: Terry-Morris 9 Oct 2006
Terry,
A while ago, we were speaking by phone and you mentioned you were experimenting with a single-part, UV epoxy, which may be suitable for outdoor (non-yellowing) use.
Were the results encouraging?
From: Terry-Morris [#2]
9 Oct 2006
To: Stunt Engraver (DGL) [#1] 9 Oct 2006
The stuff works but it develops bubbles during curing. I think it needs to be used and stored in a low humidity enviroment. Because of this I have decided not to carry it, it's not fool proof.
From: Stunt Engraver (DGL) [#3]
9 Oct 2006
To: Terry-Morris [#2] 25 Oct 2006
Terry,
Thanks for getting back to me. Too bad. I was holding out hope for such a product.
If I send some plates to you (approx 15 pcs. 1 x 3) could you dome them for me, with an outdoor-compatible epoxy?
From: Stunt Engraver (DGL) [#4]
17 Oct 2006
To: ALL
I spoke to Terry Morris by phone. Because of the trouble he was having, keeping air bubbles out of two-part urethane, he's stopped using it.
Therefore, I'm on my own for this project.
Terry was nice enough to give me the phone number (800.272.7752) of RBC, the east coast company from which he bought the one-part urethane.
I talked to Bob Hanley, who said the use of one-part UV cure urethane, while not being too scary, does have some provisos:
1) Unlike traditional UV cure epoxy, air bubbles can't be "torched" from a domed item. It's important to let air bubbles (caused by agitation, which can occur during shipping) to settle out, before application.
2) Warming the urethane, in a warming tray, or very short exposure in a microwave (3 sec.) can promote a smoother application.
When I asked about shelf life, Bob said, officially, they claim 6 months, although he added that it's better not to have the material sitting around for more than 3 months, due to the propensity of the material to thicken.
RBC was nice enough to send a sample, which will be enough for me to carry out my experiment. Naturally, when it arrives, I'll come back to this thread to offer my observations.EDITED: 17 Oct 2006 by DGL
From: Stunt Engraver (DGL) [#5]
25 Oct 2006
To: ALL
I received a sample of the one-part UV cure urethane today.
Unless I was experiencing beginners luck, I didn't find it to have a propensity for developing air bubbles, any more than I see with UV cure epoxy.
With fingers crossed, I'll see how the other 14 plates fare. :S
From: Puck (PUCKERBRUSH) [#6]
6 Nov 2006
To: Stunt Engraver (DGL) [#5] 6 Nov 2006
How'd they turn out?
I'm still looking for something that can be used for outside on the pet tags.
Puck
From: Stunt Engraver (DGL) [#7]
6 Nov 2006
To: Puck (PUCKERBRUSH) [#6] 6 Nov 2006
The material is a little finicky, as Terry Morris mentioned, but I'm learning the nuances.
Absolute perfection is proving a bit elusive, but I'm getting very respectable results.
The smallest amount of the material RBC will sell, is 1 quart, which costs about $82 and change.
The 2 oz. sample I was sent, was almost enough to do my initial order. :-)
I'm going ahead and buying a quart. If I can conquer the dragon, I'll use it on name badges etc.
In any case, I've built enough profit into the current project to more than cover the cost of the quart.
From: Puck (PUCKERBRUSH) [#8]
6 Nov 2006
To: Stunt Engraver (DGL) [#7] 6 Nov 2006
OK, now for the questions.
Is this like using the UV doming product or a different procedure?
And whats the shelf life?
Thanks,
Puck
From: Stunt Engraver (DGL) [#9]
6 Nov 2006
To: Puck (PUCKERBRUSH) [#8] 8 Nov 2006
It's just like using traditional UV cure epoxy, with the exception that you can't use a flame torch to eliminate air bubbles.
I haven't put that aspect to the test, but this material is flammable, with a flash point of 200 degrees.
Shelf life is reputed to be 6 months, but 3 months is said to be within the "sweet spot" before thickening changes the characteristics.
That would mean the material may not lay down as easily or as smoothly, leading to a "lumpy" surface.
EDITED: 6 Nov 2006 by DGL
From: Harvey only (HARVEY-ONLY) [#10]
6 Nov 2006
To: Stunt Engraver (DGL) [#9] 6 Nov 2006
To extend the shelf life refrigerating it may help. Try a little and see if it does not destroy the stuff first. Most chemicals will last over four times as long at 49* F than at 72* F. A few just will not tolerate the cold. Check the spec sheet.
A lot of UV cures will take prolonged times at 100* also. I would not heat it all, but the small amount that you will use. It thins out the goop and reduces the surface tension so bubbles pop a lot sooner and rise to the surface faster. In theory it probably will make the UV cure a little faster. (If that increase in speed is a small percentage of the time to cure or a large percentage depends on the material. (Added energy, faster reaction time.)
From: Stunt Engraver (DGL) [#11]
6 Nov 2006
To: Harvey only (HARVEY-ONLY) [#10] 6 Nov 2006
Thanks for the tips Harvey.
Makes sense.
One thing I noticed, whether real or imagined, is the material seems to be more scratch resistant.
From: Puck (PUCKERBRUSH) [#12]
8 Nov 2006
To: Stunt Engraver (DGL) [#11] 8 Nov 2006
How bad are the air bubbles? Cure time? Outside use, stay clear?
Puck
From: Stunt Engraver (DGL) [#13]
8 Nov 2006
To: Puck (PUCKERBRUSH) [#12] 8 Nov 2006
Not too many air bubbles and only noticeable on "close" scrutinization.
Brief outdoor testing says the urethane is staying clear, as opposed to traditional epoxy doming, which can yellow in a very short amount of time.
Curing time (UV exposure unit) depending on the height of the dome is about 20 minutes - similar to epoxy.
From: Puck (PUCKERBRUSH) [#14]
8 Nov 2006
To: Stunt Engraver (DGL) [#13] 8 Nov 2006
Hmmm...I did a dog tag with the UV epoxy I got from Deco and hung it outside about 4 months ago. It turned a light yellow within a week but has held up other than that. Has gone through 17 to 100+ degree days to all day rain and wind. I used a ballchain and put it on to our BQ so that it gets lots of abuse. I'm really surprised that it has done as well as it has but the yellowing is a big problem and getting the epoxy to hold to the aluminum has really been a challenge.
Do you have a part number for the stuff your using to use when ordering?
Thanks,
Puck
From: LipChip [#15]
8 Nov 2006
To: Puck (PUCKERBRUSH) [#14] 8 Nov 2006
Hello Puck,
Did any of my UV glazed products I did for you turn yellow? In over 16 years of the glazes being used, we have never heard of a yellow problem. I know it's not UV epoxy, but it's a great forever outside domed product.
From: Stunt Engraver (DGL) [#16]
8 Nov 2006
To: Puck (PUCKERBRUSH) [#14] 8 Nov 2006
The part number on my 2 oz. sample says:
UV-2345-E
From: Puck (PUCKERBRUSH) [#17]
8 Nov 2006
To: Stunt Engraver (DGL) [#16] 8 Nov 2006
Thanks.
Let me know how they continue to work out, especially if you place one out side and applied on aluminum.
Puck
From: Stunt Engraver (DGL) [#18]
8 Nov 2006
To: Puck (PUCKERBRUSH) [#17] 8 Nov 2006
The pieces are laser-engraved black over silver alum.
I'll let you know how it goes.
You may want to send for a sample. No cost, and it will help answer some of your questions, regarding the nuances of working with it.
From: Puck (PUCKERBRUSH) [#19]
8 Nov 2006
To: Stunt Engraver (DGL) [#18] 8 Nov 2006
I found where you had given a number for where you got your sample but didn't find a website, do they have one?
Thanks,
Puck
From: Stunt Engraver (DGL) [#20]
8 Nov 2006
To: Puck (PUCKERBRUSH) [#19] 29 Jan 2007
I had better luck explaining what I was looking for, over the phone, but here's the web site:
http://www.rbcepoxy.com/
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