# How can i calculate the exact amount of heat absorbed by a black paint?

1. Jul 10, 2011

1. The problem statement, all variables and given/known data
Hi.
Knowing the LRV, heat source and all other relevant details, how can we deduce the exact temp rise with black colour (or any other colour for that matter)??

3. The attempt at a solution
i think just like we do for metals, if we know the heat absorption coefficient, then it can be done.
But unfortunately i cant find anything named "heat absorption coefficient" for black colour.
Is there any equivalent?

2. Jul 10, 2011

### rock.freak667

Well usually with a given paint color you can find out the absorptivity $\alpha$ which will show how much heat it will absorb. I would assume that it will absorb up to 90% of the heat, but that may be wrong.