A cushion cover is one of the best first indigo projects going. It is small enough to dye in an afternoon, large enough to show a pattern properly, and forgiving in a way that garments are not: nobody studies the seams on a cushion. Over one weekend you can fold, dip, rinse and sew something that looks like it came from a studio rather than a kitchen table.
This project makes a 45 cm square cover for a standard 45 cm pad, using a clamped itajime grid. It is the fold-and-clamp method that gives the crispest results on a first attempt. Set aside Saturday for dyeing and Sunday for sewing, and let the cloth dry overnight in between.
Indigo bonds to natural fibres. Cotton and linen are the easiest to work with; hemp, ramie and viscose will also take dye, though viscose can go limp after a long soak. Anything with a high polyester content will come out pale and slightly grey, so read the fibre content before you buy. "Cotton-rich" is not the same as cotton.
For a cushion you want cloth with a bit of body: a medium-weight cotton, cotton drill or linen-cotton union somewhere around 200–260 gsm. Light quilting cotton takes colour fast but shows every wobble in your stitching. Heavy upholstery linen is hard to fold tightly and will need more dips for the same depth of blue.
Wash the fabric hot before you cut anything. New cloth is usually finished with sizing and other treatments that stop dye penetrating evenly, and a hot wash also settles any shrinkage. Dry it flat, press it, then cut a 48 cm square. You will trim it to 47 cm after dyeing.
Fold the square in half, then in half again, into a smaller square, then fold it diagonally into a triangle. Press each fold with your fingers as you go — sharp creases make sharp lines. Clamp the folded bundle between two flat boards: acrylic squares, chopping boards, or pieces of plywood cut to the same size. Two or three spring clamps are plenty. The dye cannot reach the fabric under the boards, so the pattern is decided by the shape of what you clamp with.
Square boards give a repeating grid of soft-edged diamonds. Circles, triangles and rectangles all work. Slide the boards off-centre for an offset pattern that looks less mechanical.
If you would rather have diagonal stripes, wrap the damp cloth tightly around a length of drainpipe or a rolling pin at a slight angle, then bind it with string every 4–5 cm. The stripes will be hazy and uneven, which is the point. Arashi is harder to control and the results are unpredictable — for a first cushion, the clamped grid is kinder.
A pre-reduced indigo kit is the most predictable route for a one-off project. Follow the maker's instructions exactly, particularly the water temperature, and keep the vat covered between dips. You will need:
Indigo powder is a fine dust, and the vat is alkaline. Mix it outdoors or by an open window while wearing a mask, keep gloves on throughout, and keep the bucket away from children and pets.
Rinse the cloth in cool water until the water runs mostly clear — this can take several changes. Then wash it by hand in warm water with a pH-neutral soap or a drop of dedicated textile detergent. Skip bleach, enzymes and harsh washing powder, all of which shift indigo.
Dry the fabric in the shade. Direct sun fades indigo noticeably over a season, and a cushion sits in daylight all day. Press it while still slightly damp, on the wrong side, and trim the panel to 47 cm square.
You need the dyed front at 47 cm square, plus two back panels at 47 cm wide by 35 cm deep. Cut the back panels from undyed cloth of the same weight, or from a second, lighter dip of the same fabric if you want a contrast.
If you have an overlocker, finish the seam allowances before turning. If not, a simple zigzag will stop fraying on the inside, where only you will see it.
Expect the first few dips to look disappointing and the sixth to look right. Uneven patches are part of the technique, not a mistake, and the place where you clamped will always be palest.
Freshly dyed indigo crocks: it rubs off onto light surfaces for the first week or two. Wash the cover separately for its first few washes, and avoid resting it against a pale sofa or a white shirt while it is new. Cold hand washes and shade drying will keep the blue deep for years.
Next time, try clamping with a shape rather than a square, or dye the back panels in a pale single dip for a two-tone cover. The technique barely changes; only the folding does.
Photo: RaniRamli / Pixabay
