Usually Line web icons are the objects with the outlined contours. Such design elements are known as contour drawings. There are items without some strict outlines which can be rather some hint than actual contour of line icons. They're referred to as gesture drawings. Such drawings are being widely used by skilled designers who can repeat the outlines of the object right after seeing it. It's not a complete piece of art but rather a sketch which usually requires 20-30 seconds to be drawn.
One more technique is adding some halftones and shades to the object. It's possible with the help of short lines and crosshatching. Dont afraid to vary their frequency and pencil pressure. And this variety creates more three-dimensional look to the object. This trick is widely used in web design as well. So this technique is really helping in creation of wonderful Line web icons, logos and buttons.The lines with the dots not combining the singular elements are known as open lines. It may look really striking when being applied to line icons design. The lines can be also parallel, gesture-like, contour etc. Contour drawing consists of great simplicity and refinement of line design. You may be want to know what is bezier curves in computer graphics? It's such type of the curves that are essential for creating complex line shapes. These curves are useful small features important for developing the vector shapes like line icons, unusual buttons etc.Computer technologies make it possible to reproduce the same designs or build new shapes based on some older ones without extra efforts and time. Another benefit is that it is simple to return to the previous adjustments with a help of the history panel. As a result there's no need to create Line icons from scratch in case you have made some mistakes.