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#1
posted to rec.boats.building
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Tinting Gelcoat
I need to make some burgundy gelcoat.
I can start with neutral gelcoat at $48.00 / gallon and add pigments to get exactly the color I want. I can buy it already colored to a match, but it's $200.00 / gallon. Other than using 4oz / gallon of pigment to color the gelcoat, what else do I need to do? I heard of a pull test. It ensures no transparency at 18 mils dry film and also ensures it will cure with that much pigment in it. What is a pull test? How do you do it? What do I need to do to ensure the gelcoat will cure properly and cover without being translucent? I have waxed two pieces of glass, about 3 x 5" and placed tape buildup along two edges to give me .018" separation. I plan to catalyze a little gelcoat and let it kick between the glass to check if for transparency and also make sure it gets hard. Any thoughts? |
#2
posted to rec.boats.building
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Tinting Gelcoat
Dan wrote:
I need to make some burgundy gelcoat. I can start with neutral gelcoat at $48.00 / gallon and add pigments to get exactly the color I want. I can buy it already colored to a match, but it's $200.00 / gallon. Other than using 4oz / gallon of pigment to color the gelcoat, what else do I need to do? I heard of a pull test. It ensures no transparency at 18 mils dry film and also ensures it will cure with that much pigment in it. What is a pull test? How do you do it? What do I need to do to ensure the gelcoat will cure properly and cover without being translucent? I have waxed two pieces of glass, about 3 x 5" and placed tape buildup along two edges to give me .018" separation. I plan to catalyze a little gelcoat and let it kick between the glass to check if for transparency and also make sure it gets hard. Any thoughts? Take a look at the offerings at: http://www.fiberlay.com/ Brian C |
#3
posted to rec.boats.building
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Tinting Gelcoat
A "pull test" is used to check the adhesion of paint on the substrate. I
don't think it has anything to do with how transparent it is. A real pull test requires a rather expensive piece of equipment. A more DIY type test would be to coat a sample substrate and let it cure. Then use a sharp knife to cut a grid of 1/2" squares. Press some 3M 250 tape over the area, wait 10 seconds or so then jerk it off. If some square come off try a different mix. -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com "Dan " Dan@ wrote in message ... I need to make some burgundy gelcoat. I can start with neutral gelcoat at $48.00 / gallon and add pigments to get exactly the color I want. I can buy it already colored to a match, but it's $200.00 / gallon. Other than using 4oz / gallon of pigment to color the gelcoat, what else do I need to do? I heard of a pull test. It ensures no transparency at 18 mils dry film and also ensures it will cure with that much pigment in it. What is a pull test? How do you do it? What do I need to do to ensure the gelcoat will cure properly and cover without being translucent? I have waxed two pieces of glass, about 3 x 5" and placed tape buildup along two edges to give me .018" separation. I plan to catalyze a little gelcoat and let it kick between the glass to check if for transparency and also make sure it gets hard. Any thoughts? |