For The Illuminati

Let’s say you’re the teacher’s pet, newly appointed to AV duty, and you want to provide maximum light transmission over the visible spectrum while minimizing infrared rays and heat transmission in the class slide projector (yup, there’s a reason you’re AV guy, not quarterback). Well, this heat-absorbing glass might be just the thing. It’s 47mm dia x 6mm thick and comes in a great little pouch, canvasy outside and soft as down inside (to prevent scratching), with a border of blue stitching.