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The choices a designer or artist can make are determined by the characteristics of the materials used, and the techniques applied to those materials. The combination of materials and techniques used are also referred to as the medium used.
Tools may be used for measurement and layout of drawings, or to improve the consistency and speed of creation of standard drawing elements. Tools such as pens and pencils mark the drawing medium as straight edges & assist the operator in drawing straight lines.
Pencils come in different lead grades that affect the strength of the marks it makes. Using different lead grades produces different effects.
Pencil grades tell you how light/hard and dark/soft a graphite pencil is. You might have noticed that graphite pencils have a H or B grade. The H stands for hard and the B stands for blackness. H pencils are harder and produce lighter lines because they contain more filler and less graphite. Pencils that fall into the B grade, on the other hand, make a darker mark because they're softer and don't contain as much filler.
B: Bold, High Graphite, Soft Texture
H: Hard, High Clay Content, Hard texture
F: Firm, Falls Between B/H
HB: 50:50 Graphite/Clay
2-9: Lightest to Darkest
Example:
9H: The Lightest/Hardest/More Clay
9B: The Darkest/Softest/ More Graphite
H Grades - These are pencils with leads that have more clay. They are harder and are less prone to smudging. They are best used for outlines, sketches, and technical drawings. The higher the number it is, the lighter the mark.
B Grades - These are pencils that have more graphite content. They are softer, more pigmented, and easier to smudge. These are good for creating shades. The higher the number, the softer the lead.
It is important as an artist to get to know your tools. I bring it up often because I find it imperative to explore the whole range your tools can offer you and it helps you be a better artist. Yes, you can always use limited tools and many artists do. But have you ever heard the saying: “Learn the rules like a pro, so you can break them like an artist” - Pablo Picasso
Mechanical pencils are frequently used because they are reliable, erasable, cheaply refilled and therefore a very sustainable product. Fine lead pencils can be used for drafting, sketching and drawing or writing quick notes. Many illustrators are using mechanical pencils for drafting their art before finishing it with india ink. In the wide assortment of mechanical pencils you also find propelling pencils which are as easy to write with as with normal mechanical pencils.
Pens are writing tools that use ink to make marks. There are a wide variety of pens available, but the modern pens have an internal reservoir and a cap that makes it easy for artists to carry it around. Technical drawing pens have a number of special features, which make them quite different from other pens.
A technical pen will normally be available in a range of line widths, sometimes conforming to ISO standards. We have pens from 0.03mm to 2.0mm, and 14 widths in between. They will usually produce a more stable line than most pens, with very little variation in width along the stroke.