cyanotype & ISO

what is cyanotype printing? 

Cyanotype printing is one of the oldest and simplest photographic printing processes that has been used for over a century. The process involves coating a piece of paper with a light-sensitive emulsion that contains two chemicals: ferric ammonium citrate and potassium ferricyanide. These chemicals react when exposed to UV light, which turns the emulsion blue. The paper is then washed with water to remove the unexposed emulsion, leaving behind a beautiful, detailed print that is unique to each piece of paper. Cyanotype printing can be done on various surfaces, including paper, fabric, and even wood, making it a versatile medium for artists and photographers alike. It is also an affordable and accessible process that can be done at home with minimal equipment. Whether you're a professional photographer or a beginner, cyanotype printing is a fun and rewarding way to create beautiful works of art that are sure to impress.

what is ISO? 

When you increase the ISO, you allow the camera to capture more light in a given scene. This means that you can take pictures in darker environments without having to use a flash or a slower shutter speed. However, when you increase the ISO, you would also increase the amount of noise in the image. Noise is the grainy texture that appears in the image, especially in the darker areas. This can make the image look less sharp and less detailed. 

it's important for me to choose the right ISO for the situation. If I'm shooting in a bright environment, I would use a lower ISO, which will give a cleaner image. If shooting in a darker environment, I would need to increase the ISO. 

ISO is an important aspect of photography that can greatly affect the final image. It's important to understand how ISO works and how to choose the right ISO for the situation in order to get the best possible results. in the following images, I've taken a few of the same photos but changed the ISO to capture the difference.