The solid central core distinguishes a colored pencil from the regular pencil. Graphite is the core material for the regular or classic type of pencil. Dye, pigments and other additives are meanwhile used for colored pencils. Technology employed to develop both pencil types are similar, except for the color of the leaded core itself which differentiates both pencils.
Colored pencils are classified in two types: wax based and oil based. The properties and application of each type are discussed in this article.
Wax-Based Colored Pencils
The wax based implements are actually crayons enclosed in a wood cylinder casing. These are also referred to as pencil crayons because the central solid core lead is produced using wax, dyes or pigments and other fillers. Wax binds with these pigments to produce hard or soft pencil cores. Hard thin cores are ideal for outlining and sharpening the edges of compositions. Meanwhile, soft thick cores allow for the smooth and creamy rendering of colors on the surface without requiring a lot of elbow grease. Soft core colored pencils produce a smooth, silky feel on paper that makes them suited for blending and shading.
The wax based implement is also reasonably priced compared to other types of colored pencils. However, the cores are prone to breakage and wax bloom. Wax bloom refers to a powdery white coating or hazing that surfaces over the rendering.
Oil Based Colored Pencils
The art implement is similar to graphite pencils in properties so that markings paper can be erased easily. The Oil based implement employs a vegetable oil binder that makes it rigid and also not susceptible to blooms and fogging. Due to the inherent character of the solid core, this implement finds practical use in all forms of trades, whether sketching for artists, mathematical computations, industrial processes and product assembly lines, among others.
A variant of this popular material is the Color Stick, which was specifically developed for artists and other trades that require no excessive sharpening waste. Frequent pencil sharpening after the solid core is eaten-up by abrasion will prove to be very inconvenient for many users. Color sticks are large in size and pentagonal-shaped. These are also available in full colors but without the wood casing. The implement is intended to fully respond to various marking or drawing techniques. Moreover, the tip can be used to create fine lines or broad application using the flat sides. It is definitely a convenient art implement for the prominent and aspiring artist because color shades are available in over two dozen hues.
In the end, your choice of a particular colored pencil type determines your intended application and preferences in terms of usage and output.
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