Cyanotype exposure time app

With this app on your phone you can accurately measure the correct exposure time for cyanotypes in all weather conditions. Simply use the estimator or let the app control the exposure for you. The app will adjust its exposure on the fly if the weather changes. The app also has the option to pause and resume the exposure. This app gives you a clear advantage of size, quantity and uniformity over other methods of exposing, perfect for large format cyanotypes and large quantities of cyanotype prints.

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Test exposures

There is only one setting on the app – Dose. Just do a few test exposures. All test exposures below use the exact same Dose.

What are Altxpo’s advantages over exposure lamps?

No size or quantity limit

Cyanotypes without limits. Much more versatile than a UV lamp.

No Hot spots

Perfectly even exposures.
Completely eliminates the hot spot problem that UV lamp exposures can suffer from.

Portable Exposure Meter

Use it anywhere. Nature walks, Field classes, Remote locations. No network connection needed.

Any conditions

Get perfect exposures in all weather.

Great for groups & classes

If you need to expose a large amount of cyanotypes just give the apps estimate time to your students and let them time their own pieces.

Works with Many UV based processes.

Cyanotype, Gum printing, Salt printing, Argyrotypes, Van Dyke (VanDyck) , Platinum/Palladium, Carbon , Kallitype , Albumen Printing, Screen printing or any process that can use Natural UV for exposure.

Reviews

Hi
I bought your app with pretty low expectations as I have tried others which proved to be worse than useless.
To my surprise I am BLOWN AWAY by Altxpo! 
Altxpo has enabled me to produce cracking prints in changeable British weather. I’ve worked with it and altered exposure percentage, sometimes using up to 105% for dense contrasty negatives, at other times just 60%.
I’m an experienced cyanotype printer, using sun when possible and UV lamps during darker months. I’m pretty sure I’ll be using Altxpo nearly all the time from now on. I trust it!
My work can be seen on @catherineorrpictures (the more recent flower images were all done with Altxpo)

Best wishes
Catherine

Catherine

@catherineorrpictures

It was wonderful to estimate the exposure time on sunny summer days, and as autumn is coming, I will appreciate it all the more so as uncertain whether makes it difficult to decide on the right exposure time.

Reviewer

Pre release app tester

The app is very useful and easy to use. It is great to have a good estimate time and the countdown counter is a good feature. I am looking forward to trying it in different weather conditions.

Reviewer

Pre release app tester

The app is very useful and easy to use. It is great to have a good estimate time and the countdown counter is a good feature. I am looking forward to trying it in different weather conditions.

Reviewer

Pre release app tester

The sun is by far the best light source for exposing cyanotypes and similar processes. Cyanotype exposure in natural light has always been challenging to achieve. In any weather conditions, any time of year the Altxpo app is designed to achieve results that are consistent and controllable.
You can decide the depth of the exposure and expose multiple cyanotypes to the same darkness level, even on different days and different weather conditions.
The consistent results add a uniform professional look to artwork in exhibitions or collections especially with larger pieces.
In a class environment an instructor providing the correct exposure time can have confidence that every students artwork will be a success.

Simple one off Pricing

Download it Now

For UK cyanotype supplies we can recommend cyanotype.co.uk and solarart.co.uk