Cyanotype Exposure Times for today Saturday 09/11/24
Please note that the times below are approximate for sunlight exposing between 10am & 4pm.
Sunny: 3m 30s Light cloud: 8m Medium cloud: 35m
Sunny = Clear sky. Light cloud = You can clearly see the sun’s position through the clouds. Medium cloud = You can not see the sun’s position through the clouds, but the clouds are bright. Heavy cloud = It is not possible to give a time for dark heavy winter clouds. It can be more than 1-2 hours.
Times are based on the conditions below: Exposure time: Between 10am & 4pm. Location: Central UK, exposure outside, clear view of sun’s position without obstruction. Glass: No (Some glass will filter UV light and may need a longer exposure). Coating: Classic Formula on paper (dried overnight). These times are only a guide to help exposing with the sun, you may need to adjust exposure times to suit your setup. Always do a step test if you need more accurate timings.
New Cyanotype Exposure App
You Just point your phone screen at the sky to get an accurate exposure time in any weather. You can see more about the app at altxpo.co.uk
This app is only available for Android devices but will be available for Apple soon.
App Exposures
November overcast
Cyanotype exposure on a cloudy day in November at noon UK using the app estimate.