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Haze turns to scales
Haze turns to scales
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Randy Mugford
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Randy Mugford
posted 6 Years Ago
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Hello, I am casting my projects upside down on a smooth plastic, almost glass surface. I cast this way as I place my furniture pieces in the resin on my second or third pour ( curved wood). I notice a soon as I pour my first coat, a haze like film appears on the surface, almost seems to thicken instantly. It is only obvious at an angle initially. As the project cures, over a period of a few days this haze goes scally/off white and noticeable looking through the resin once removed from the mold and flipped over. As I have curved wood in the resin protruding out is is impossible to sand out/remove. How do I avoid this initial haze? I have attached two images. the close up is the image looking through the top, where you can see the white scales.
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6 Years Ago by
Randy Mugford
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Haze turns to scales
Randy Mugford
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6 Years Ago
Hi Randy, the concept of the table looks great and you should be able to get a perfect/flawless finish so we'd like you to get to the bottom of the cause of this problem. In the first instance, what....
Rich (Staff)
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6 Years Ago
Thanks for the reply. No release agent is being used. I cast it on a very densePolypropylene, almost glass finish. Releases easy. I apply on coat 1/4 inch thick, then after 12 hours place the wood...
Randy Mugford
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6 Years Ago
That looks like amine blush type thing to me. I'd bet it is due to measuring inaccuracy or not well mixed resin. Big quantities can be hard to mix properly.
SleepingAwake
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6 Years Ago
Thank you. I will double my mix time and see what happens. I thoughtamine blush was a moisture reaction. I wondered if the heat gun caused the reaction. Once again thanks!
Randy Mugford
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6 Years Ago
As above I would say moist related or temperature changes, unproper mixing, and now that you talk about heat gun, there is a big chance you "burned" your epoxy, if you leave your heatgun to long on a...
matthieutje65
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6 Years Ago
Thanks. I'll put this in point form to make it quicker ... A. The wood is kiln dried laminate, and has 4 coats water base finish (this haze is apparent without contacting the wood).B. With or without...
Randy Mugford
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6 Years Ago
Thanks for the extra info! Do you mix your resin by hand or by machine? do you use the 2-cup mixing system where you mix in the first cup then transfer everything in the second cup and mix again? thi...
matthieutje65
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6 Years Ago
By hand with a metal stir stick. I have not done a double cup transfer, but will try that in a few hours as I do another pour. Resin is stored in the same room as casting. If I can I will take an...
Randy Mugford
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6 Years Ago
hope it wont happen but if it does share some pictures :) visuals are always easier to find answers :D
matthieutje65
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6 Years Ago
The camera could not catch it properly, however you can see that once scrapping the film off, it clumps together and is white. this happens with 1 minute for the pour:(
Randy Mugford
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6 Years Ago
The only time I have seen a scummy film like that on GlassCast has been when the temperature has dropped or the humidity was a bit high either generally or locally. We found that if you leave it, the...
Warren (Staff)
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6 Years Ago
Thanks again. After scraping it off ( took an hour) it was clear and fine. Leaving it on the last pour creates a blush when it dries that is impossible to get rid of, and worsens over time. I do live...
Randy Mugford
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6 Years Ago
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