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19 replies to this topic
Posted 28 August 2012 - 08:21 PM
Am I correct in the fact that this is measured with even amounts of the two parts? I don't have scales and do it by sight, which works 99% of the time. Once in a while I mix a batch that doesn't cure entirely. In reading the post about the new stuff (ACC I believe) I think it mentioned some measure it a little different?? Am I doing it wrong?
Posted 28 August 2012 - 09:37 PM
I measure D2T by eye, by squeezing out matching lines (don't ask me how I got to be an expert in lines ) and it seems to work out fine.
It is supposed to be mixed 1 to 1 by volume, not weight.
Edited by mark poulson, 28 August 2012 - 09:38 PM.
Posted 29 August 2012 - 07:06 AM
My advise is to get a digital scale from harbor freight. Cost like ten bucks, and never have to worry about bad mixes
Posted 29 August 2012 - 07:08 AM
It will work perfect everytime if you weigh it out. I have been using it for years
in the 4 oz. bottles. And I always weigh it out in equal amounts.
Posted 29 August 2012 - 07:09 AM
Thats not bad $10, I'll have to check that out....thanks.
Posted 29 August 2012 - 08:46 AM
If you plan to mix by weight, contact the manuf. to find the exact ratio. I've read it's 1.2/1 by weight, but I've never tried it that way, and don't even know which is which in the ratio.
The directions say 1/1 by volume, so that's what I've always done.
I've mixed by eye for years, and never had a bad batch. It is somewhat forgiving in terms of exact mixture.
Posted 29 August 2012 - 08:49 AM
I mix the D2T the same way, by eye. Two equal size puddles, mix and mix some more, be sure all the material is mixed.
Posted 29 August 2012 - 11:06 AM
I used the "equal puddles" method for years and never had a failure to harden. But I noticed that some batches were more prone to yellowing than others for whatever reason. To eliminate the possibility that the yellowing is caused by inexact measuring, I've started to use syringes to measure epoxy. That way, I'm SURE the parts are exactly equal. And I'm learning exactly how much epoxy it takes to do my baits, so I'm probably saving a little epoxy too.
I don't understand weighing epoxy since the manufacturer specifies measuring by volume - but no harm, no foul I guess! That said, my digital scale gets plenty of exercise every time I build a bait. The only way I know to get truly repeatable results on a series of baits is to weigh the components and keep a record of of the build so next month or next year, I can build a bait the same way - or make informed decisions on how to change things for better performance.
Posted 29 August 2012 - 12:07 PM
I tell kids to pay attention in school cause you never know how you can use the stuff they try to teach in chemistry class. You can use that stuff in mixing epoxy. Epoxy manufacturers say to mix Part A and Part B in equal amounts of volume. That's one given. Another given is that each part has a property called density. In science density is a property of mass (or weight) per unit volume. So part A has a density and part B has a density. So if you know the density of each part you can mix the Part A and Part B using the mass or weight of each part. Just gotta know what the density of each part and that you can get from the manufacture. To get a mix of equal volume means you have to mix different weights of each part depending on the density of the part. If one part is heavier than the other part then more weight will be needed of that part. I say use whatever methods works for you. If you have a scale that measures accurately then you got a choice. Mr Spillman (RIP) would be proud of me that I remember this from his chemistry class. What will get you is getting sloppy about mixing the parts using either weight or volume.
Somebody else can explain the math part of school.
Posted 29 August 2012 - 01:04 PM
I simply weigh the two bottles when they are new. The etex hardener weighs something like 220g and the resin weighed about 200. So when I make a batch I mix 1.1g hardener and 1..gd resin. I also put the etex in the clear ketchup squezz bottles from waly world.
Posted 29 August 2012 - 06:05 PM
I just squirt out equal (as close as possible) amounts into hospital med cups and then mix 'em together.
Posted 29 August 2012 - 07:31 PM
Take care, and keep you head down. Those hurricanes are nothing to fool around with.
Posted 08 September 2012 - 01:13 AM
We dodged a bullet this time, Mark....although we got 19" of rain in 30 hours. Not so lucky farther west in Louisiana, tho.
Posted 08 September 2012 - 10:54 PM
For mixing my epoxy topcoat I'm using disposable little medication jars from plastic , .......these have a millilitres scale embossed , so I can get very accurate .
cheers , diemai
Posted 10 September 2012 - 10:48 AM
I've always measured by volume, started by using a syringe but they got nasty & needed replaced often. SO, I began looking for an alternate measuring device. Now I'm using measure'n SS spoons clean 'em with alcohol. Work great & never need replaced. Popcicle stick used to remove epoxy from spoon.
Posted 11 September 2012 - 06:42 AM
I mix my epoxy like Mark does as well, and never had a problem with D2T. Mix both parts really well and you are good to go.
Posted 17 March 2013 - 09:35 AM
I came upon this thread and thought I'd add a reply that might be helpful.
For about 4 cent per mix, you can pretty much eliminate the guess work.
The little one ounce cups have four different ways you can achieve equal measures. I use drams measurements.
They also work fantastic for measuring out envirotex lite or whatever topcoat you prefer.
Posted 17 March 2013 - 09:46 AM
Mark I forgot about this post, however, everytime I read a post you make, it always makes me snicker. You should have a side job as a comedian.