How surfaces cockle, wipe clean and bleed in Easel by Zaweba

Paper is not a passive thing. Soak a thin sheet and it buckles, put ink on rice paper and it creeps along the fibres, paint on glass and you can wipe it away with a cloth. Easel by Zaweba brings those behaviours into the studio, so the surface you choose changes how the paint acts rather than just how the picture looks.

This article covers the four surface behaviours Easel models, what causes each one, and how to use them or avoid them.

Cockling and stretching

Cockling is the buckling you see when thin paper takes on a lot of water. The fibres swell, the sheet ripples, and paint gathers in the valleys. In Easel, thin paper cockles when it is soaked, just as a cheap sheet does on a real desk.

The traditional cure is stretching. You wet the paper, tape it down round the edge with gummed tape and let it dry flat and taut. Easel offers the same fix: a sheet stretched with gummed tape round the edge stays flat when you flood it with water.

So the habit to learn is simple. If you plan big wet washes on thin paper, stretch it first. If you are only doing light work, or you actually like the uneven pooling a cockled sheet gives, leave it as it is.

Slick surfaces that wipe clean

Glass, glazed tile and synthetic paper are slick. Paint sits on top instead of soaking in, so it can be wiped off again. That makes these surfaces good for practice and for loose experimental work where you want to take things out as freely as you put them in.

It also changes how you paint. On a slick ground you can wipe back to a clean surface to recover a highlight. Treat it as a feature. Lay in a tone, wipe out the lights, and you have a quick value study.

Fibrous papers that bleed

Rice paper is the classic fibrous surface. Its long fibres pull liquid outward, so marks spread along them and edges soften on their own. In Easel, fibrous papers such as rice paper bleed along their fibres in the same way.

This is the look behind much East Asian brush painting, where a single loaded stroke spreads into a soft halo. To use it well, think about the amount of liquid on the brush. Plan for the spread rather than fighting it, and leave room around strokes that will grow.

Scraperboard and blades

Scraperboard works the other way round. You start with a dark coated surface and take it away with a blade, so the drawing is made of the white you reveal. In Easel, blades scratch scraperboard back to white.

The trick here is thinking in reverse. Every mark you make is a light, so work out where the brightest highlights go first and build your tones with closely spaced lines. Cross hatching works well. Short strokes give texture, long ones describe smooth form.

Picking a behaviour on purpose

All four of these behaviours come from the surface, not from a setting on a tool. That means the decision happens when you choose the ground for a new picture. A few pairings tend to work well. Rice paper with sumi ink or a soft brush. Stretched watercolour paper for large washes. Glass or tile for sketches you might wipe and restart. Scraperboard for crisp illustration.

If something odd is happening, look at the surface before you blame the brush. A wash that pools in ripples is probably on unstretched thin paper. Ink that will not stay put is probably on a fibrous sheet. Paint that comes off too easily is on a slick ground. Knowing which surface does what makes those surprises useful instead of annoying, and Easel by Zaweba gives you plenty of each to explore.