Choosing colored pencils for mystery mosaics

How many colours you actually need

Colour-by-number keys are built around a limited palette on purpose — usually between eight and eighteen colours per page. A 24-pencil set covers every key in the One Square More catalog with room to spare. A 72-pencil set will not make a mosaic better; it will make finding the right pencil slower.

Where a larger set does help is matching. If your set has three greens and the key wants a specific olive, having six greens makes the finished page closer to the intended image. That is a refinement, not a requirement.

Wax versus oil-based pencils

Wax-based pencils lay down colour quickly and smoothly, which suits mosaics because you are filling a lot of small identical shapes. They also blunt faster and can leave a slight sheen if you press hard.

Oil-based pencils hold a point far longer and give crisper square edges, which matters when squares are small. They need more pressure to reach full saturation. For dense adult grids, oil-based is usually the better tool; for large-tile books like Cozy Cats, it makes almost no difference.

Why the point matters more than the pigment

This is the thing most people get wrong. In a mosaic, quality comes from clean edges between adjacent squares, not from pigment richness. A cheap pencil kept sharp will produce a better-looking page than an expensive pencil worn to a stub. Keep a sharpener on the table and use it far more often than feels reasonable.

Markers and gel pens

Fine-tip markers give the flattest, most graphic result and suit the Black Edition 90s books particularly well, where the pixel-art look is the point. Gel pens are excellent for small accent squares and for metallics.

Alcohol markers will bleed through most paperback paper. Because every One Square More page is printed single-sided, a bleed will not ruin a second puzzle — but place a scrap sheet underneath anyway.

Paper, pressure and mosaic edges

Work in two light passes rather than one heavy one. The first pass tells you whether the colour is right; the second builds saturation. Heavy pressure on the first pass burnishes the paper and makes corrections impossible.

For edges, tilt the pencil so the point meets the paper at the corner of the square, and pull inward. Pushing outward is what causes colour to creep into the neighbouring square.

A sensible starting kit

• One 24-colour pencil set, wax or oil-based
• A handheld sharpener with a container
• A white eraser for stray marks
• A desk lamp — genuinely the highest-value item on this list
• Optional: a pack of fine-tip markers for accent squares

That kit will carry you through every book we publish. If you are choosing a first title to use it on, the full catalog is here.