To print many documents as it can be large print runs for newspapers or magazines as understand not the same type of printer you have in your house are used.
Digital printing comes to denote a set of technologies widely used today in which similar to inkjet or laser but very large, much larger than any that you can find in an office printers are used. This system has long been more expensive than others such as offset printers that are those traditionally used for these impressions.
The main difference from other types of processes used for printing on large scales is that digital printing rollers need not create porta plates as in offset. This means that offset printers have to create a roll, ie prepare it for printing, for each of the sheets you want to print.
Another fundamental difference between printing let us call it traditional and lithography or offset is that the latter when using impregnate inks on paper, get to wet, in the case of digital printing is not the case because what is formed is a film about this is then converted into steam liquid.
When we talk about digital printing Realize we are referring to a set of legacy technologies of domestic printers, ink cartridges using about where it is stored in liquid form and toner or laser printers.
Liquid ink in the paper is scanned line by line by depositing ink where it is needed. It is therefore slower printing.
In the laser system it is completely different, here is an electrically charged roller. When the laser impinging on certain areas we change the type of load. I am just release the toner is magnetic ink stick only to the areas we want to step making paper image is formed. In this case the printing is faster and because the value of the cheapest toner.
Obviously the choice will depend on your budget, you need to have in terms of quantity printing and time to do it but you have to take into account a number of general principles
The offset is faster. Not surprisingly it has been using to print newspapers from time immemorial.
The quality of the offset is greater. It is designed for this type of an offset printer prints obtained without many problems better quality than digital. This gap is narrowing gradually and certainly offset depends on the type of printer you use.
Digital printing is cheaper. Especially if you are going to use for printing a few units offset printing can not merit to anything worthwhile. Note that you do not need plates, machines are smaller, etc.
The answer is quite simple as you see, if you want quality and you do long runs using offset printing but ask yourself digital printing.