A grease pencil is a wax-based marking tool designed to write on surfaces that regular pens and pencils can’t grip, including glass, plastic, metal, ceramic, and glossy or wet materials. Also called a china marker or chinagraph pencil, it’s one of the most versatile marking tools available, used in industries ranging from filmmaking to medicine to warehousing.
How a Grease Pencil Works
The core of a grease pencil is a solid stick of wax or grease mixed with colored pigment. Unlike graphite pencils that leave a dry mark through friction, grease pencils deposit a thin, waxy layer that clings to smooth and nonporous surfaces. This is the same principle that makes crayons work, but grease pencils are formulated to be softer and oilier so they adhere to slick materials like glass and glazed ceramic.
Most grease pencils come wrapped in a tight spiral of paper rather than encased in wood. To expose more of the core, you pull a small string embedded in the wrapping, which peels the paper away in a strip. No sharpener or knife needed. Some versions use a mechanical holder similar to a click pencil, and others come as simple unwrapped sticks for heavy industrial marking.
The tool has been around since at least the late 1700s, though it was originally used for purely industrial and practical marking rather than artistic work. Over the centuries it picked up dozens of names reflecting its many applications: lumber crayon, railroad crayon, glass marking pencil, checking crayon, leather crayon, and even cattle marker.
Common Uses Across Industries
The main advantage of a grease pencil is that it marks reliably on surfaces where ink-based tools fail or become permanent. That single property makes it useful in a surprisingly wide range of settings.
In warehouses and shipping, grease pencils mark cardboard boxes, plastic wrap, and metal containers with inventory codes or handling instructions. Film and television editors historically used them to mark editing points directly on celluloid film strips. Photographers used them to circle selections on contact sheets. In aviation, mechanics mark inspection points on aircraft skin. Butchers use them to label cuts on wax paper or plastic-wrapped trays.
In laboratories, grease pencils are a standard tool for labeling glass slides, beakers, flasks, and petri dishes. The marks stay put through handling but can be wiped off when the glassware needs to be cleaned and reused. This makes them preferable to permanent markers in settings where labeling is temporary by design.
In medicine, grease pencils and similar wax-based markers have been used to mark patients’ skin before surgical or dermatological procedures, helping clinicians identify precise treatment areas. Oil-based marking pens descended from grease pencil technology were documented in clinical use as early as the 1950s.
Grease Pencils vs. Permanent Markers
The most common alternative to a grease pencil is a permanent marker like a Sharpie, and choosing between them comes down to what you need the mark to do. Permanent markers use alcohol-based ink that soaks into porous surfaces and bonds tightly to smooth ones. Grease pencils leave a waxy deposit that sits on top of the surface.
This difference matters in three practical ways. First, grease pencil marks are removable. You can wipe them off glass, metal, or plastic when you no longer need them. Permanent marker marks require solvents to remove and sometimes leave ghosting or staining. Second, grease pencils work in wet conditions. Because the core is wax-based rather than water or alcohol-based, a grease pencil can mark a wet surface where a marker would skip or bleed. Third, grease pencils never dry out. Leave a marker uncapped for a day and the ink evaporates. A grease pencil has no ink to dry, so it works reliably even after years of sitting in a toolbox.
Where permanent markers win is precision and durability. A fine-tip Sharpie can write much smaller text than a grease pencil, and its marks resist smudging in a way wax marks don’t. For labeling that needs to last through rough handling, a permanent marker is the better choice.
How to Remove Grease Pencil Marks
Because the marks are wax-based, they respond well to a few simple approaches. On glass and smooth metal, a microfiber cloth with warm water usually does the job without any chemicals. For stubborn marks on equipment or hard surfaces, lighter fluid (naphtha) is widely considered the most effective solvent. It dissolves the wax cleanly and evaporates without leaving residue or damaging paint and silk-screened labels underneath.
Melamine foam sponges (sold as Magic Erasers or similar products) also work well with just water. The key rule when using any solvent is to test it on a hidden area of the surface first, since different finishes react differently. On delicate or painted surfaces, start with the gentlest method and work up.
Art and Creative Applications
While grease pencils were not originally intended as art supplies, they’ve found a niche among artists and illustrators. The soft, waxy mark has a distinctive look on paper, producing bold lines with a slightly translucent quality. They work on toned paper, black paper, and mixed-media surfaces where graphite or charcoal wouldn’t show up well. White and yellow grease pencils are especially popular for highlighting on dark backgrounds.
In lithography, a traditional printmaking process, grease-based crayons and pencils are essential tools. The artist draws directly onto a stone or metal plate with a grease pencil, then treats the plate so that ink adheres only to the greasy drawn areas during printing. This is one of the oldest technical applications of wax-based drawing media. It’s worth noting that specialized lithographic crayons can contain pigments that carry health warnings, so artists working in printmaking should check labels for safety certifications. The standard to look for on any art material sold in the U.S. is “Conforms to ASTM D-4236,” which indicates the product has been evaluated for chronic health hazards.
Where to Find Them
Grease pencils are sold at office supply stores, art supply shops, hardware stores, and online retailers. They typically come in packs of 6 or 12 in a single color, with black, white, red, and yellow being the most common options. A pack usually costs between $3 and $8, making them one of the cheapest specialty marking tools available. Individual colors are also sold for specific tasks, like white for marking dark film or metal, or red for editorial and inspection work.