Found this:
http://web.archive.org/web/20080109222210/http://www.grand-illusions.com/roman.htm
Quoting rhobbs3@aol.com:
> I believe he contact prints to a still living leaf. The part of the
> leaf that gets sun stays green, the rest becomes pale. It can also
> be done large scale to a lawn.
>
>
> -----Original Message-----
> From: Michael Koch-Schulte <mkochsch@shaw.ca>
> To: alt-photo-process-l@usask.ca
> Sent: Thu, 12 Feb 2009 8:51 pm
> Subject: Chlorophyll Prints
>
>
> I was just looking at Binh Danh's Dag's
> (http://www.hainesgallery.com/artists/Danh_Binh/Danh_01.html) and
> noticed he's doing Chlorophyll Prints. First I've heard of them.
> What are they? (can hardly wait for the debate on which medium
> (read: leaf) give the best contrast range). :)?
> ~m?
> ?
>
>