How do I lift out watercolour and correct a mistake?

Watercolour has a reputation for being unforgiving, and it is partly deserved, but a great deal can be recovered if you know which of the two variables is against you. Pigment choice and paper quality decide most of it before you touch a brush, and knowing which of your paints stain is one of the more useful things you can find out about your own palette.

Step by step

1. Find out which of your pigments stain.Paint a stripe of each colour on a scrap of your usual paper, let it dry fully, then try to lift half of each stripe. Phthalos, many modern organic pigments and most bright synthetics stain heavily. Earths, cobalts and many traditional pigments lift well. Keep the test sheet.
2. Work on cotton paper if correction matters to you.Cotton rag paper has internal sizing that keeps pigment nearer the surface and a surface robust enough to survive rewetting. Wood-pulp student paper absorbs pigment into the fibre and disintegrates under a scrubbing brush.
3. Rewet the area with clean water and wait.Do not scrub immediately. Lay clean water over the area with a soft brush and give it fifteen or twenty seconds for the dried paint to soften and release. Patience does more than pressure.
4. Blot rather than rub.Press kitchen paper or a clean cloth onto the wet area and lift it straight off. Rubbing damages the surface and drives pigment further in.
5. Use a thirsty brush for precise lifts.Squeeze a soft brush almost dry, touch it to the wet area, and it draws the water and pigment up. Rinse, squeeze, repeat. This is how you lift a highlight in a cloud or a rim of light on a branch.
6. Use a stiff brush and a stencil for a hard-edged lift.Cut the shape out of scrap paper or use a plastic template, hold it firmly on the painting, and scrub gently inside the opening with a damp stiff synthetic brush, blotting as you go. It gives clean edges the soft methods cannot.
7. Know when to stop.If the surface starts to look furred or fuzzy, the paper fibre is breaking up. Stop immediately — that area will never take a smooth wash again, and continuing turns a colour problem into a hole.
8. Consider covering rather than removing.In many cases the honest solution is a darker glaze over the top, an opaque touch of gouache, or accepting the mark and adapting the picture. Watercolourists develop this judgement early.

Tips

• A magic eraser sponge, used barely damp and very gently, lifts more than a brush on robust cotton paper. It is abrasive, so it is a last resort and a single pass only.
• Lifting works best while a painting is fresh. Some pigments continue to bind into the paper over days and become progressively harder to remove.
• For a soft light shape, lift while the wash is still just damp — a thirsty brush at that stage takes a lot out cleanly with no edge at all.
• Opaque white gouache used sparingly for a final highlight is completely normal practice, whatever the purists say. Used to cover large errors it looks chalky and obvious.

Common mistakes

• Scrubbing immediately without letting the water do the work — The paint has not released yet, so you are abrading paper rather than lifting pigment. Wet, wait, then lift.
• Trying to lift a staining pigment back to white — It will not happen, and the attempt destroys the paper surface. Check your stain chart, and if it stains, plan to cover instead.
• Working over a lifted area before it is fully dry — The damaged sizing takes paint unevenly and the new wash will bloom and blotch. Dry it completely and test with a light touch first.

If it doesn't work

Questions people ask