Project is not everything
Everyone likes when the leaflet is colorful, aesthetic and legible. However, a lot depends on the project itself, in other words, graphics preparing the files for printing. He must be aware of the basic matters regarding composition and layout. A well-made leaflet will certainly have a better effect than a short, ugly one.
A lot also depends on the printing house and the selection of paper and the type of printing. A leaflet looks better on shiny and smooth paper than on a torn parchment. The type of paint and the method of printing is also not insignificant, and its selection is best entrusted to a specialist in this topic or to pass on a printing company that has extensive experience with each type of orders.
Labels, stickers ...
Printing is not only printing leaflets, business cards or large banners - it also prints other, necessary materials such as: stickers, self-adhesive letters or labels. In principle, everything that comes out of the printing house can be included in the category of printing.
There are plants specializing in the production of only a specific group of printed materials: eg leaflets, or only large-format printing. However, this results from a simple thing: for every type of printing you need to have the right machine, and these take up space and cost a lot. That is why printing plants limit the amount of services provided.
Standards in every industry and business are important. Imagine that we buy a monitor and its input does not match our video card, even though it has the same type. That's why certain standards apply.
In polygraphy and graphics, such standards also exist - appropriate definitions of CMYK colors - key for the appropriate color reproduction. Specified in advance formats for printing leaflets and business cards, so that they are comfortable and as uniform as possible. Without standards, even leaflets could be completely unreadable and even repulsive.