The Basics of How a Photocopier Works

Making a copy of a document or page is one of the revolutionary inventions in the history of the world that impacts billions of people. While most of us do not care about where photocopying first took place or how it happened, there is a fascinating history about it. You go to a printing shop to get photocopies Geelong for documents and other stuff, but do you even bother to ask how photocopying works?

Photocopying is nothing new, and while most people think it is one of those modern conveniences that rely heavily on a machine and its mechanical setup, a significant part of the process of making a copy involves human intervention. For example, the initial steps of opening the copier lid, placing the document subject for photocopying, selecting copying or printing options, and pressing the start button all require human hands. Those steps also happen to be the most mundane, which means you do not pay that much attention to them. Well, the amazing part is what’s happening inside the photocopying machine.

At the heart of the copier is the concept of opposite charges that attract each other. If you listened to your primary school teacher back in the day, you probably are familiar with how static electricity works. Like for instance, if you rub a balloon on your jacket or shirt, the process creates static electricity. The force from the static electricity charges the balloon, allowing it to attract small things like sugar and paper. If you are pondering why we are talking about that, the reason is that the photocopier works in a similar function. In producing photocopies Geelong, the copier makes use of a unique drum inside it that charges with static electricity. There is also a toner inside the machine, characterised by its fine black powder appearance. When the drum charges and is full of static electricity, it attracts the toner particles.

So, what makes the drum and toner relevant in photocopying? Well, the truth is they mean everything. The drum can ingeniously charge in a selective manner, which means that only some parts of it will attract the toner. The way the copier works is that it creates an image through static electricity on the drum’s surface. Accordingly, you create static electricity on the drum if the original sheet of paper is black, while a white paper does not generate the charge. The way it works is that the white areas of the sheet of paper must not attract the toner. The concept of selectivity paves the way for the photocopying process.

The actual process begins with the charging of the drum surface, followed by the movement of an intense light beam across the paper you put on the glass surface. There is a reflection of light from white areas of the document, which in turn leads to striking the drum underneath. Once a photon of light hits, there is an emission of electrons from the photoconductive atoms found in the drum, thereby neutralising the positive charges situated above. The dark areas on the original sheet of paper won’t reflect onto the drum, which means there are areas of positive charges on the surface. The toner spreads over the drum surface, while pigment particles will adhere to the positive charges. The sheet of paper with a positive charge passes over the drum surface, in the process attracting the beads of toner. As the paper got heated and pressed, what happens is that the image forms through the toner and to the surface of the sheet. That is how the photocopying occurs.