Cyanotype is a photographic process that was first created for the use of blue prints of buildings. The cyanotype process has remained one of the cheapest way to create a photograph. The Cyanotype cotton squares are a good way to start experimenting with this process.
The pack consists of 25, 6’x6’ squares, in a light proof bag so you can get the full potential from each exposure. These can be bought in different colours. All of them have been pre-treated with chemical, ready to be exposed to sunlight and then simply washed. The fabric is high quality, it can be machine washed and also be exposed on both sides of the fabric.
The material is archival, therefore you can keep the picture for years without fading or tearing. The squares are a simple concept, but do not have limitations when it comes to alternative process. You can imprint just about anything on these squares just by leaving the item on top of the square and exposing it to sunlight.
With items that cannot be permeated by light, this will create a reverse silhouette on the square. The object will be a light lime colour (using lime cotton squares) in detail and the background will become dark, when washed. This only takes 10 to 15 minutes, as the detail of the object cannot be captured.
However if you take something that is light permeable, such as a negative, it will have to be left on the light sensitive square for longer to capture the detail. Almost as if you were using the sun, as an enlarger in the darkroom.
On a good sunny day you can leave the negative on the square for a couple of hours, depending on how much detail you want to transfer, more light and time, the more detail essentially.