How do photocopy machines work?
Reading Time: < 1 minuteTHE technology underpinning this ubiquitous piece of machinery came about 75 years ago, when inventor Chester Carlson used static electricity created with a handkerchief, light and dry powder to make the first copy on Oct 22, 1938. Today, most photocopiers use a technology called xerography, a dry process that uses electrostatic charges on a light-sensitive […]
What is the technology behind freeze dried food
Reading Time: < 1 minuteMANY foods are freeze-dried today. The staple of astronauts, soldiers, and hikers, freeze dried foods are considered a good way of storing food (and some make great healthy snacks!). However, it might be surprising to note that the technique of freeze-drying is quite old. Freeze-drying is a three-step process that begins with freezing. Next the […]