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Old 06-15-2008, 02:34 PM
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Ful-Thane problem?

Hi guys! I've got a little problem with flash time with nason ful-thane.I just finished a couple of wet coats with a metalic and it does'nt seem to be setting up like the other ful-thane I've shot. The plan was to let it sit for about 4 hours and then start clearing. I'am going by the tape over spray and after about 2 hours it's still almost wet. I used a quart size mixing cup to mix about a quart sprayable at 8:1:2, But I'am starting to think I made a mistake mixing. Anybody know of a good site or thread on how to use the graduated mixing buckets.I'am good with 4:1 and 3:1,but I think I blew it with 8:1:2 mix ratio in a small amount. I'am also using a medium speed reducer and it's between 80 and 85 low humidity out today

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Old 06-15-2008, 03:56 PM
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Whatever you do, do not clear it today and see how it is tomorrow.

Also need to check how much activator is missing out of can and how much paint is missing and see if the ratios are close, reducer is not important but the activator is.
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Old 06-16-2008, 11:19 AM
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FYI.
Ful-Thane
You can also "figure" it this way,
4/.5/1 if this helps.
Some of these mixing ratios are confusing but if you can divide by 2,it makes a little more "sense".
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Old 06-16-2008, 04:23 PM
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Ful-Thane problem!

I think I got lucky this time! I just took a look at yesterdays work and 24 hours later it looks good hardened up nice. For once I had the weather on my side, and I think it saved me. But I'am still not confident about mixing small batches of this 8:1:2. I know I was off on the hardener and lucky for me it was more forgiving than I expected. I know now that I need to better understand the mix ratios of different urethanes before I get myself in trouble. If I had to mix just enough for an air brush I wouldn't know were to begin.
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Old 06-18-2008, 06:44 AM
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Old 06-18-2008, 07:07 AM
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Ful-Thane problem!

Thanks oldfool! I did bow it on the reducer. I got it in my head that the paint/hardener parts be cut in half "2". I shot a quart last night in what I think is the right mix and it set up better. Not much reducer in relation to the paint and hardener
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Old 06-18-2008, 12:08 PM
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I mix it 8:1:1 and never had a problem.
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Old 06-19-2008, 09:53 PM
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Ful-Thane problem!

Which is just about where I'am ending up with my mix, 8:1:1. Just for the sake of convesation, If you look at old fools cup,"which is about the same as mine" and your only mixing a little, the first column is filled to the 1. The second column is filled to the 1 with hardener and the third is filled to the 2 with thinner "8:1:2", I must be wrong because when I do that the paint is to thin. When I back off the thinner to what I think is a 8:1:1 ratio every thing is good
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Old 06-20-2008, 05:34 AM
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Quote:
Originally Posted by jimmy1
Which is just about where I'am ending up with my mix, 8:1:1. Just for the sake of conversation, If you look at old fools cup,"which is about the same as mine" and your only mixing a little, the first column is filled to the 1. The second column is filled to the 1 with hardener and the third is filled to the 2 with thinner "8:1:2", I must be wrong because when I do that the paint is to thin. When I back off the thinner to what I think is a 8:1:1 ratio every thing is good
I thought I was clear in my description of how to use a mixing cup, but I guess I wasn't.

First thing to do is find section with YOUR mixing ratio, (which is the top listing of each of those confusing sections).



2: you add your first ingredient which in your case is 8, so you fill the 8 (left)column in the proper section to the number 1 with your paint.

3: you add you second ingredient which in your case is 1, so you fill the 1 (middle) column in the proper section to the number 1 with your hardener.

4: you add your third ingredient which in your case is 2, so you fill the 2 (right) column in the proper section to the number 1 with your thinner.

Now you have a mix of 8 parts, 1 part, and 2 parts.

DO NOT use different reference numbers , always use the same reference numbers in a given section, or you will NOT have the desired ratio that you wanted..



If you need a larger quantity of mixed material then the 1 level make, then choose the 2 or the 3 or the 4 or whatever, but use that same number in each of the columns when adding to the chosen section.

The cup is already calibrated for each column to give the final ratio.

Look closely at the distance between the levels of the 3 lines in the 8:1:2 section. You will see the left is 8 times as great from the bottom to the 1 as the distance from the left 1 to the center 1, and the distance from the center 1 to the right 1 is twice the distance of the left to center, hence 8:1:2

It takes 8 parts to fill to the left 1, an additional 1 part to the center 1 and 2 additional parts to fill to the right 1, and all of those parts are as equal as your ability to fill the cup to the mark.

When you put in a 1(left )1(center) and 2(right) as you said you did, your final ratio was 8:1:16( i think)

This is as clear as I can explain it, hope I didn't confuse you worse

Last edited by Old Fool; 06-20-2008 at 05:40 AM.
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