barium sulfate – WindowsTechs.com

That Ultra-White Paint That Helps Cool Surfaces? Make your Own!

Posted on July 22, 2023 by Donald Papp

It started with [KB9ENS] looking into paints or coatings for passive or radiative cooling, and in the process he decided to DIY his own. Not only is it perfectly accessible …read more Continue reading That Ultra-White Paint That Helps Cool Surfaces? Make your Own!→

Cannonball Mold Makes a Dandy Integrating Sphere for Laser Measurements

Posted on February 7, 2022 by Dan Maloney

Integrating sphere test setup

It’s an age-old riddle: if you have a perfect sphere with a perfectly reflective inner surface, will light bounce around inside it forever? The answer is pretty obvious when you …read more Continue reading Cannonball Mold Makes a Dandy Integrating Sphere for Laser Measurements→