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The Ferroblend Process

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  • Feb 3, 2026
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Theodor Bader

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How lightsensitiv is this ferrolbland?

I wonder how light-sensitive this method is? More so than cyanotype methods (traditional and new)?

Is an in-camera application conceivable?
 
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Andrew O'Neill

Andrew O'Neill

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How lightsensitiv is this ferrolbland?

I wonder how light-sensitive this method is? More so than cyanotype methods (traditional and new)?

Is an in-camera application conceivable?

The inventor of the process @Raghu Kuvempunagar would be able to answer this better than me...but even if you could do it, why would you want a ferroblend negative?
 

Raghu Kuvempunagar

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How lightsensitiv is this ferrolbland?

I wonder how light-sensitive this method is? More so than cyanotype methods (traditional and new)?

In the same ball park as Cyanotype.


Is an in-camera application conceivable?

No, at least as far as I can see. For FerroBlend, Ferricyanide needs to be present in the sensitiser which invariably slows down the exposure. Even Cyanotype isn't really useful for in-camera application unless one keeps Ferricyanide out from the sensitiser (as done in Cyano-Rex type processes).
 

Theodor Bader

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Thanks for your answers!

The idea of using cyano-blend comes from me and my Facebook page "The Fascination of Black and White Negatives," which so far only shows black and white negatives. I myself only have one in-camera cyanotype print so far.
 
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