Sunday, February 24, 2008

Cotton Paper

Cotton paper is prepared from 100% cotton fibers. Cotton paper is superior in both strong point and durability to wood pulp-based papers, which may contain high concentrations of acids.

May also be identified as cotton rag or ragged paper.

Cotton fiber papers is identified to last several hundred years without fading, discoloring, or deteriorating; so is often used for important documents such as the archival copies of dissertation or thesis. As a rule of thumb, each percentage point of cotton fiber, a user may be expecting one year of resisting deterioration by use (the handling to which paper may be subjected).(reference - Southwest Paper Co). Legal document paper naturally may contain 25% cotton.

Cotton paper is also use in banknotes. Modern banknotes are characteristically made from 100% cotton paper, but can also be made from a mixture of 75% or less flax[citation needed].

Cotton bond paper can be establish at most stores that sell stationery and other office products. Though most cotton papers include a watermark, it is not necessary that your paper have one.

Sunday, February 17, 2008

Pen-Based Plotters

A plotter is a vector graphics printing machine which operates by moving a pen over the surface of paper. Plotters have been (and still are) used in applications such as computer-aided design, though they are being replaced with wide-format conformist printers (which nowadays have sufficient resolution to render high-quality vector graphics using a rasterized print engine). It is general place to refer to such wide-format printers as "plotters", even though such handling is technically incorrect.

Sunday, February 10, 2008

Liquid Inkjet Printers

Liquid inkjet printers very small, precise amounts (generally a few picolitres) of ink onto the media. These droplets of ink will carry a small electrical charge. The placement of the ink on the page is then determined by the accuse of a cathode and electrode between which the ink moves towards the paper. Inkjet printing (and the related bubble-jet technology) are the most general -quality inkjet printers are inexpensive to produce.

Virtually all recent inkjet printers are color devices; some, known as photo printers, include extra pigments to better reproduce the color gamut needed for high-quality photographic prints (and are additionally capable of printing on photographic card stock, as opposed to plain office paper).

Inkjet printers consist of nozzles that create very small ink bubbles that turn into tiny droplets of ink. The dots shaped are the size of tiny pixels. Ink-jet printers can be able to print high excellence text and graphics. They are also more or less silent in operation. Inkjet printers have a much lesser initial cost than do laser printers, but have a much higher cost-per-copy, as the ink needs to be frequently replaced.

In addition, consumer printer manufacturers have modified a business model similar to that employed by manufacturers of razors; the printers themselves are frequently sold below cost, and the ink is then sold at a high markup.

Various legal and scientific means are employed to try and force users to only purchase ink from the manufacturer (thus leading to vendor lock-in); however there is a thriving aftermarket for such things as third-party ink cartridges (new or refurbished) and refill kits.

Inkjet printers also have the disadvantage that pages must be permitted to dry before being aggressively handled; premature handling can cause the inks (which are adhered to the page in liquid form) to run.

Tuesday, February 5, 2008

Systems Theory

Systems theory is an interdisciplinary field of science and the study of the nature of complex systems in natural world, society, and science. More specificially, it is a framework by which one can investigate and/or describe any group of objects that work in concert to produce some result. This could be a single organism, any organization or society, or some electro-mechanical or informational artifact. Systems theory as a technical and universal academic area of study predominantly refers to the science of systems that resulted from Bertalanffy's General System Theory (GST), among others, in initiating what became a project of systems research and practice. It was Margaret Mead and Gregory Bateson who developed interdisciplinary perspectives in systems hypothesis (such as positive and negative feedback in the social sciences).