In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. This is called passive solar design because, unlike active solar heating systems, it does not involve the use of mechanical and electrical devices.[1]
[pinit] I looked on the back of a Magic Eraser package the other day and noticed there werenât any ingredients listed. That seemed very odd to me since just about every cleaning product out there has some kind of ingredient. I did a quick search and found out Magic Erasers are made of a product called melamine foam.
The kneaded eraser is made from a type of rubber that absorbs the graphite so there is no residue and it doesn't wear away. However, it gets dirty quickly, at which point, you have to knead it to push the dirty surface inward to have the clean area on the outside, or you can also clean it to remove the graphite.