Sun and Cloth: Exploring Cyanotype Printing on Fabric
Cyanotype printing on fabric remains one of the oldest photographic processes still loved by contemporary makers, producing luminous Prussian blue imagery wherever sunlight touches cloth. The technique uses iron salts rather than ink, with the chosen objects, drawings, or pressed botanicals acting as light-blocking stencils during exposure. For Australian makers, the craft feels almost tailor-made: long bright afternoons, dry air, and a textile culture already drawn to embroidery and botanical motifs make the country a natural home for sun-print experiments.
At Smart and Becker Creative the technique has been folded into embroidery workshops and slow-stitch sessions as a way of layering narrative onto cloth. Members often draw from local flora such as eucalyptus leaves, banksia pods, and pressed wattle blossoms, all of which leave crisp silhouettes on prepared cotton. Whether a maker is producing a panel for a stall at Finders Keepers in Sydney or a quiet study piece at home in Hobart, the craft rewards patience and a willingness to let the sun do most of the work.
A Brief Lineage of Blue
Cyanotype was invented in 1842 by the English scientist John Herschel, and the botanist Anna Atkins later used it to publish the first book illustrated with photographic images, Photographs of British Algae. The chemistry is surprisingly gentle, made from a mixture of ferric ammonium citrate and potassium ferricyanide brushed onto fabric or paper, dried in the dark, then exposed under a sheet of glass to UV light.
Where light reaches the prepared surface the iron compounds reduce and form the deep blue pigment known as Prussian blue. Where an object blocks light the chemistry stays unexposed, and that area is rinsed away during washing to leave a pale, defined silhouette. Because water is the developer rather than any chemical bath, the process is safe enough to run from a flat balcony in Brisbane or a back garden in Adelaide with no special ventilation at all.
Choosing and Preparing the Right Cloth
Not every textile behaves the same way under cyanotype chemistry, and the choice of base fabric shifts both the depth of blue and the crispness of the resulting image. Cotton and linen take the sensitiser beautifully, while silks absorb it unevenly and most synthetics reject it altogether. Pre-washing all fabric is essential because sizing, optical whiteners, and any leftover conditioner will interfere with how the iron bonds.
| Fabric | Absorbency | Tonal Range | Best Use |
|---|---|---|---|
| Cotton muslin | High | Pale sky to deep midnight | Garments, panels, learning pieces |
| Linen | High, slightly variable | Soft and textured | Wall pieces, embroidery base |
| Raw silk | Medium | Muted and cloudy | Scarves, fine art prints |
| Cotton jersey | Medium-high | Even mid-blue | Wearable items, T-shirts |
| Cotton duck | Very high | Saturated and intense | Tote bags, upholstery |
Locally sourced pillowcases or thrifted linen from op shops in Melbourne's Brunswick or Sydney's Newtown can be torn into workable sizes and pre-washed in hot water before treatment. Cut a few swatches first and run them through as a trial, because every water source and bolt of cloth will bring its own small surprises to the chemistry.
Working With the Australian Sun
Exposure is where the craft turns almost into a quiet ritual, and Australia's UV index makes it wonderfully forgiving. A bright morning in Perth can fully expose a piece in as little as twelve minutes, while overcast winter afternoons in Canberra may stretch an exposure to forty minutes. The classic test is to place a coin on the fabric and lift it periodically, watching the colour shift from yellow-green to bronze before the final blue emerges after rinsing.
The chemistry involves a delightful unpredictability, with each timed exposure carrying suspense similar to well-known slot machines, where the result depends on variables a maker can prepare for yet never fully control. Lay the prepared fabric on a rigid board, arrange the botanicals flat, and weight everything with clear acrylic to keep contact tight. Studio members often carry boards to the rooftop for stronger UV during winter, particularly in Melbourne where daylight shifts dramatically between seasons.
Rinsing, Drying, and Setting the Blue
Once exposure is complete, lift the fabric carefully and carry it into a dim space to rinse. Cold running water is essential, because warm water can cause the unexposed chemistry to stain rather than wash away cleanly. Watch the initial green-yellow runoff drift toward clear streams as the image defines itself, and finish with a few drops of mild dish soap or a splash of white vinegar to neutralise any lingering iron salts.
A standard washing machine cycle finishes the oxidative process, deepening the blue toward its true Prussian tone. Hang the cloth in shade rather than full sun to dry, because direct sun at this stage will shift colour unevenly and can soften outlines over time. Iron the piece flat while still slightly damp if it is intended as a base for embroidery, screen printing, or layered collage work.
Starter Notes for First-Time Printers
Once basics are in place the process opens into a generous range, from collaged multitone pieces to stitched embellishment over photograms. Try pressing camellia leaves in Adelaide or tea-tree sprigs from a Perth backyard, and pair them with photographic negatives printed on transparency film. Layer two separately exposed pieces at different stages, or tint the final print with a weak tea wash for a faded denim effect.
A few practical starting points worth keeping in mind before the first session:
- Pre-wash all fabrics and dry them in shade so the chemistry bonds consistently.
- Work under safelight conditions such as a yellow bulb or a darkened room before exposure.
- Brush the sensitiser on with a foam roller for even coverage rather than a brush that can streak.
- Always rinse in cold water first, then finish with a machine wash to set the blue.
- Test on small swatches before committing to a larger piece or a paid commission.
- Store unused sensitiser in a clearly labelled amber bottle, kept away from children and pets.
- Keep a small exposure journal beside the workboard, because UV intensity varies by season.
Bring a prepared textile to the next workshop at Smart and Becker Creative and spend an afternoon building the first sun print alongside our resident artists. The studio welcomes makers at every stage, and appointments can be booked through the calendar for private sessions or group events.