THE CHEMICAL PROCESSES BEHIND THE XEROGRAPHY TECHNIQUE
Author: @madridbg, through Power Point 2010, using public domain images. andreas160578
Greetings and welcome dear readers of the Steemit platform who are passionate about scientific content with practical contributions from a flexible perspective. In this sense, through the publication that we will share through the @Projecthope community, we seek to address the chemical processes behind the process of photocopying or xerographic techniques, as a technological advance with great importance in the business and academic world.
INTRODUCTION
It is no secret that chemistry is based on the understanding of the periodic properties of the different elements that make up the periodic table and that are present in our lives, either naturally or synthesized by the hand of man.
In this sense, and with the intention of achieving a conceptual approach according to the title of this thematic we will analyze some basic characteristics that manifest the elements belonging to group 6A, among which stand out Sulfur, Selenium, Oxygen, Polonium and Tellurium.
These elements are great representatives of chemical behavior, for example the oxygen present in all combustion processes and is essential for life on the planet, sulfur, substances necessary in amino acids and photovoltaic process among other applications and uses that we can give these substances.
However, in this research we will focus on the use of selenium mainly of non-metallic character, a lustrous semiconductor applied in the processes of copying and reproduction of images on paper, fundamentals that we will describe below.
CHEMISTRY BEHIND THE PHOTOCOPING PROCESS
Prints on paper have been of growing interest for human development, which is why different methods have been implemented that allow us to obtain better quality and durable images over time.
Among the methods implemented, wet photographic methods and printing using carbon paper stand out. However, these advances seem to have become obsolete from 1950, where technological processes began to emerge in terms of images and today we can reproduce images of unimaginable qualities.
Fig. 3. Representation of photocopying machine, by means of selenium drum Author: pxfuel
But beyond the advances generated, the appearance of the photocopying process revolutionized business and office work, thanks to the diversification, speed and efficiency of these amazing machines.
Nowadays, wet compiling has been replaced by dry processes (xerography) where the photoconductive properties of selenium are used. This process implies that the conductivity of this element increases by a factor of 1000 when it is exposed to light and when light decreases, conductivity decreases.
Fig. 4. Representation of the xerographic process Author: Yzmo
Chemically the process starts when the drum filled with selenium is uniformly charged with positive charge, which when exposed to a lens irradiated with light, is able to generate an image according to the electrical charges, which is transferred to the paper when the element in the drum loses conductivity due to the absence of illumination.
At this point, it is necessary for the paper to come into contact with the negatively charged toner which will be responsible for printing the image that we can perceive sensorially through our eyes. So the toner particles act as a pigment that when heated adheres to the paper fixing the image and restarting the process for a new copying action.
CONTRIBUTIONS OF THE SUBJECT
Undoubtedly, chemical processes are indispensable in our daily work, from those related to metabolic issues, to major technological advances that have chemical systems as the main engine of operation.
Hence the need to keep us informed and with basic knowledge that allows us to generate a holistic view of reality and scientific knowledge. That is why through this topic we have been able to make a conceptual approach to issues related to the periodic properties and the photoelectric effect exhibited by the elements.
BIBLIOGRAPHICAL REFERENCES CONSULTED
[1] Chang, R. (2010). Chemistry. Tenth edition. McGraw-hill Interamericana publishers. ISBN: 978-607-15-0307-7.
[2] Ralph, H. Petrucci, William S. Harwood, E. Geoffrey Herring. (2003). GENERAL CHEMISTRY. Eighth edition. PEARSON EDUCACIÓN. S.A., Madrid.
[3] WADE,LEROY. (2011). . ORGANIC CHEMISTRY. VOLUME 2. SEVENTH EDITION. PEARSON EDUCACIÓN, MEXICO, 2011 ISBN: 978-607-32.()793-5. AREA: SCIENCES.
OF INTEREST
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Grateful with the community @project.hope and with all the management team of the same one that they motivate us to continue working in a mutual and balanced growth.
hello @madridbg,
it is impressive how a technology that seemed incredible a few years ago today is something old and impractical, although it is still used in some cases generally people prefer the xerography, this makes me think that in a few years other technology will seem old I imagine a future where the use of the tlf will be considered an old technology, as humanity we are going at such an impressive speed that it is difficult to adapt since every day a technique to do something goes from being the most innovative to be the most archaic possible.
Greetings friend @trabajosdelsiglo no doubt we are facing the era of the technological revolution from there that I consider that we will not be able to adapt to the accelerated changes that in this area of presents.
So we have to learn from the obsolete to innovate and develop new processes, in one way or another science will be present and always hand in hand with technological processes, in order to improve our quality of life.
Thank you for your valuable comment.
Hello @madridbg
What you bring to share is very interesting information, most of the time we don't stop to think about how these processes we frequently use occur.
Another reality is that not everyone has enough basic information to understand these complex processes, although the truth is that what you have raised is easy to visualize.
Greetings.
There is no doubt that selenium is the element that has revolutionized our technology, and photocopying machines accelerated many processes related to the reproduction of documents, definitely this technological development changed the way of working in the office. And all thanks to selenium's ability to interact with light.
Greetings friend @emiliomoron,
Thanks for stopping by and leaving your valuable input, of which I will highlight the following aspects:
The applications of selenium are numbers and range from the clinical to the technological aspect.
This type of advancement is developed through scientific process, hence this type of content assumes a great relevance because in a way we are literate readers in the area of science, under a simple and understandable optics.
Greetings
Greetings @madridbg, excellent explanation of how the printing and photocopying process is done, personally I did not know how the photocopying process was and the importance of the chemical element Selenium in this process.
Thank you for sharing this information.
Greetings Professor Ruben @carlir, it is great to know that this type of content allows us to understand fundamental aspects of our daily lives, since many of us have come across devices such as the one mentioned in the article and do not know the scientific processes involved in these technological advances.
Thanks for stopping by and sharing your perspective....
Very good post. And now what is trending in terms of printing? 3D printers. Even houses are printed nowadays!
By @hojaraskita
Greetings @hojaraskita certainly the capacity for innovation of human beings is amazing, hence the emergence of new 3D printing and artificial AI behind this new mechanism to bring the digital to the tangible.
We will be doing a literature review to answer your questions. Thanks for stopping by and leaving your perspective.
Best regards...