Perplexing paint mixing problems - need help from math guys!
 

It's actually for an epoxy primer.

1 quart primer taxes 1/2 ounce of hardener.

But I only need to mix 8 ounces of primer.

So how much hardener?

I figured .75 teaspoons (3/4 of a teaspoon).

But it doesn't seem to come out right.

Here's my math:

1 qt = 32 oz.

1/2 oz = 3 tsp.

I want 8 oz, so that's 1/4 of a quart.

So I need to use 1/4 of the hardener, which would be .75 tsp. (1/4th of 3 tsp = .75).

Where am I going wrong, math dudes!

Set up a ratio (assuming your conversions are correct-I didn't check)

32 oz over .5 oz = 8 oz over X
8*.5= 4
4/32= .125 oz hardener
If 1/2 oz = 3 tsp like you say (I didn't check)
.125 oz would be .75 tsp

But then again I stink at math, so wait for another opinion.

I got .125 oz also.
How many cc is that?
You know, for using a syringe...
:)

0.125 US fluid ounces = 3.69669121 cc

approximately. ;)

1 Qt. = 32 oz
You want 8 oz which is 25% of a quart

0.5 oz of hardener x 0.25 =0.125 oz. or 1/8 of an ounce.

I'm curious as to what kind of epoxy primer you are using. The epoxies I've used are 4:1 or 2:1 ratio for primer to activator.

Ok, never used that brand. I see that their epoxy mix ratio is 2:1 which is similar to other brands.