https://padlet.com/kierajohnsonliddle/pfk8458i7enh its all a little blue en-us 2017-03-28 20:50:45 UTC 2025-06-27 00:30:20 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Soccerball.png kierajohnsonliddle https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163270904 A cyanotype is a light sensitive chemical solution that can turn any piece of paper or fabric light sensitive in order to print an image on to it. The process relies on the light sensitivity of iron salts which create blue tinted images, hence the name CYANotype]]> 2017-03-28 21:32:31 UTC https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163270904 kierajohnsonliddle https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163271817 - 25g ferric ammonium citrate
- 10g potassium ferricyanide
- hydrogen peroxide
- distilled water
- empty 500ml beaker
- gloves
- scales
- 2 brown bottles
- non-metallic brush/glass rod (for coating)
- contact printing frame
- large format negative
- watercolour paper
- UV lamp (optional)
- trays for processing]]> 2017-03-28 21:39:18 UTC https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163271817 kierajohnsonliddle https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163282305 Making The Solution;
1) For Solution A, mix together 10g of potassium ferricyanide and 100ml of distilled water in one beaker marked 'A'.
2) For Solution B, mix together 25g of Ferric ammonium citrate and 100ml of distilled water into a second beaker marked 'B'.
3) As two separate solutions they have a shelf life of several months- provided they are stored in a cool dark place.

Combining Solutions;
4) Under the red lights of a darkroom, mix equal parts of solutions A & B. The resulting cyanotype solution is now light sensitive and will appear as an intense yellow-ish colour.

Coating Your Chosen Medium;
5) Ensure that the medium you are using, whether that is fabric or paper, is stretched out flat and secured down with tape or binder clips.
6) Brush a thin but even layer of the solution over the fabric first horizontal and then vertical for even coverage, making sure that the covered area is the right size for the large format negative you are using to print.
7) Leave the medium in a dark area to dry thoroughly.

Exposure;
8) Sandwich the large format negative you wish to print onto the medium between the medium and a panel of glass (avoid UV-filtering glass or plastic).
9) Take the medium out into the sunlight or expose under a UV light (a UV box or tanning lamp), exposure times may vary.

Developing;
10) Once it has been exposed the cyanotype needs very little to develop. All you need is a a few water baths, filled with preferably distilled water- but a gentle flow of running water from a tap will suffice.

Washing & Drying;
11) Once you are happy with the cyanotype, run the material under running water for 15 minutes to remove any yellow cyanotype sensitiser out of any underexposed areas.
12) Hang the print up and allow to dry.]]> 2017-03-28 23:26:22 UTC https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163282305 kierajohnsonliddle https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163284834 My cyanotype was not totally successful, despite having a pleasing aesthetic to it. This is because the piece of fabric I used was not the most appropriate for this experiment. This is because it was very thin fabric and it was also not 100% cotton (this is the best fabric to use as it is pure and absorbent, not resistant). As you can see below it has the typical blue hues of a cyanotype, yet none of the print has stayed on the material. If i were to repeat this process on a cotton shirt the results will be far more successful.]]> 2017-03-28 23:54:30 UTC https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/163284834 kierajohnsonliddle https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/166480029 - Ensure that any material you use is 100% cotton.
- If you can, do a test strip before you actually expose the final piece.]]> 2017-04-16 19:39:59 UTC https://padlet.com/kierajohnsonliddle/pfk8458i7enh/wish/166480029