are they easy to refill with your own ink?
does the ink in them last longer than inkjets?
does the ink in them last longer than inkjets?
Tell me about it - not fun when swapping toners wearing a white shirtArcticBeast said:a lazer printer doesnt use ink as such its all in powder form and is very messy and nasty stuff,
dave said:oh and what are these drums, do they need replacing?
wikipedia said:There are typically six steps involved in the laser printing process:
- Charging: A corona wire (in older printers) or a primary charge roller projects an electrostatic charge onto the photoreceptor, a revolving photosensitive drum or belt which is capable of holding an electrostatic charge on its surface as long as it hasn't been exposed to certain wavelengths of electromagnetic radiation.
- Writing: A Raster Image Processor (RIP) chip converts incoming images to a raster image suitable for scanning onto the photoreceptor. The laser is aimed at a moving mirror which directs the laser beam through a system of lenses and mirrors onto the photoreceptor. Lasers (now typically laser diodes) are used because they generate a coherent beam of light for a high degree of accuracy. Wherever the laser strikes the photoreceptor the charge is reversed, thus creating a latent electro-photographic image on the photoreceptor surface;
- Developing: The surface containing the latent image is exposed to toner, very fine particles of dry plastic powder mixed with carbon black or coloring agents. The charged toner particles are electrostatically attracted to the photoreceptor where the laser wrote the latent image;
- Transferring: The photoreceptor is pressed or rolled over paper, transferring the image. Higher end machines use a positively charged transfer roller on the back-side of the paper to pull the toner from the photoreceptor to the paper.
- Fusing: The paper passes through a fuser assembly, which, having rollers that provide heat and pressure (up to 200 degrees Celsius), bonds the plastic powder to the paper;
- Cleaning: When the print is complete an electrically neutral rubber blade cleans any excess toner from the photoreceptor and deposits it into a waste reservoir, and a discharge lamp removes the remaining charge from the photoreceptor.