
Post by bearcat on Apr 4, 2018 6:07:50 GMT 5
Trying to calculate how much resin needed to fill a 1"x1"x6" mold. I come up with 6 cubic inches. If I use .554 as the amount of Alumilite in one cubic inch of volume, then I need 3.3 ounces of Alumilite Clear. So, how many grams of Alumilite Clear are in 1 cubic inch? Is it the same for Alumilite White? Thanks!



Post by mike on Apr 5, 2018 14:56:34 GMT 5
The mixed specific gravity of Alumilite Clear is approximately 1.08 meaning there is approximately 9 lbs per gallon. So how I would do this by weight is to multiply 9 lbs/gallon times 454 grams/lb which will give us a number of grams per gallon = 4,036 grams per gallon of mixed Alumilite Clear.
There are also 231 cubic inches in a gallon so we need to figure out how many grams we need per cubic inch. So if we divide 4036 grams by 231 cubic inches per gallon it will tell us we need 17.47 grams per cubic inch. To do 6 cubic inches ... multiply 17.47 times 6 = 104.8 total number of grams ... 52.4 of the A side, 52.4 of the B side. I'd probably round up to 55 grams or a little more of each side for what will be left over in the mix cup.
To convert that back into wt oz ... google tells us 17.47 grams = .616 wt oz. per cubic inch. Which multiplied 6 gives you a total of 3.696 wt oz to fill that 6 cubic inch cavity. Then divide that by 2 to see how much A side and B side you need.
Whew ... there is all that math we never thought we would ever need again back in school.
Hope this helps. Mike



Post by bearcat on Apr 5, 2018 15:29:05 GMT 5
Mike, thank you for that very complete answer (and using that math we tried to forget a while ago)! Your response is very helpful.
Jon



Post by Brian on Apr 5, 2018 19:29:47 GMT 5
......................Whew ... there is all that math we never thought we would ever need again back in school......... Mike When I think back On all the crap I learned in high school It's a wonder I can think at all And though my lack of education Hasn't hurt me none I can read the writing on the wall
Thanks for the Advanced Mathematics 101 class Mike......



Post by on Nov 8, 2018 9:09:51 GMT 5
Here is a different way to get at it in case your brain is wired like mine.
___.554 ounce____ X ____1 milliliter___ X ____ 1.05 grams____ = 17.2 grams mixed Alumilite per cubic inch 1 cubic inch Alumilite .03381402 ounce milliliter Alumilite mixed
So, if you have 6 cubic inch mold, 6 cubic inches x ___17.2 grams Alumilite___= 103.2 grams Alumilte mixed cubic inch
Note: My answer differs slightly because Carol at Alumilite just confirmed with me that the mixed specific gravity of Alumilite Clear is 1.05 even though the tech sheet says 1.04.

