Drawing Materials for Grid Work
The materials our articles name, in one place, each with the reason it is named. Nothing here is required to use the grid maker; a pencil, a ruler and any paper will do. This is what to reach for when a piece asks for more, and the reason attached to every item tells you when it does.
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Graphite pencils
Grid work uses three grades for three jobs. A hard pencil, 2H or H, rules the grid: it stays pale and lifts off cleanly when the drawing is done. HB carries the construction, visible enough to judge and soft enough to erase. 2B and softer go in last, for contours and the darkest values. A set that spans 2H to 6B covers all of it; the portrait article and the figure article explain the order.
Erasers
A kneaded eraser lifts graphite by dabbing, which is how grid lines come off a finished drawing without disturbing the tones around them. Knead it to expose a clean surface and shape it to a point for a single line. A precision vinyl eraser takes out one line or pulls a small highlight where a kneaded eraser is too soft to aim.
Paper
Paper is chosen by medium. Vellum Bristol has the tooth graphite and charcoal need to build value in layers; smooth Bristol has almost none, which is what technical pens want and what makes it wrong for shading. A sketch pad is for studies and construction. Toned paper starts you in the middle value so lights and darks are both drawn. Mixed media paper takes a light wash without buckling; for real watercolour you want cotton paper at 140 lb (300 gsm), and a block saves stretching it. The watercolour and charcoal article covers why the pencil grid must come off before the first wash.
Charcoal and fixative
A charcoal grid is drawn in charcoal, not pencil: thin willow at the lightest pressure, because willow is binder-free and lifts off with a kneaded eraser or a rag. Compressed charcoal gives the blacks willow cannot reach and commits to the paper. Workable fixative lets you keep drawing over what is fixed; spray it knowing it darkens the lightest values first.
Technical pens
Botanical and architectural work is inked over a pencil grid with pigment fineliners: the ink is waterproof once dry, so the pencil underneath erases without smearing the line. Four nib sizes cover outline, detail, texture and the finest hatching, as the botanical article lays out. Metal-clad tips can be run against a ruler.
Measuring
Grid accuracy is drawing accuracy. A T-square rules lines square to the paper edge, which a loose ruler does not, and one with both inch and centimetre scales matches whichever unit the worksheet maker printed.
Coloured pencils
Wax-based pencils have soft cores that blend and burnish; oil-based pencils have harder cores that hold a point for detail and layer without wax bloom. Lightfastness ratings matter for work that will hang. The large wooden-case sets are the full ranges; the smaller sets are the same pencils in fewer colours.
Digital
On a tablet the grid lives on its own layer: export it from the grid maker as a PNG, drop it above the reference, toggle it off to check proportions, and nothing has to be erased. A pen tablet without a screen works with any display; a pen display lets you draw on the image itself.