So here are links to many ways to make an inkjet negative (originator / method name given):

• Dan Burkholder - the guy who started it all: http://www.danburkholder.com/Pages/main_pages/book_info_main_page1.htm
• Keith Schreiber - Pyro Colour : http://www.zianet.com/jkschreiber/articles/1280PyroDigiNegs.html (link no longer works)
• Jim Reed - Using GIMP : http://www.alternativephotography.com/articles/art026.html
• Gary Nored - for Van Dyke Browns : http://unblinkingeye.com/AAPG/DigiNegs/Workflow.html
• Mark Nelson - PDN : http://www.precisiondigitalnegatives.com/
• Clay Harman - Colour Ratio : http://www.alternativephotography.com/articles/art056.html
• Michael Koch-Schulte - RNP Array System : http://www.inkjetnegative.com/images/RNP/rnp.htm
• Ron Reeder - Quadtone RIP / QTR: http://www.ronreeder.com/articles/QTRManualv2.pdf and http://www.digital-negatives.com/Document Files/Improved QTR printing.pdf
• Ron Reeder and Brad Hinkel: http://www.digital-negatives.com/
• Bill Maybrey - Basic and Advanced for Gum: http://www.billymabrey.com/How_to/Making_Digital_Negative.htm and http://www.billymabrey.com/How_to/Advanced_Negative.htm

Personally, I just convert to B&W if I have to, adjust the image to my liking, invert and print, but hey, that's me. Simple and straight to the point. I've been happy with my results.

Regards, Art.

Christina Anderson has just posted a quick overview on a lossy method (i.e. you will lose tones) of creating digital negatives for printing gum over at AlternativePhotography.com

http://www.alternativephotography.com/articles/art121.html

Yep, I loved that, too, Don, and hopefully that means she KNOWS that each is a chapter because she has already written them and her gum book is close to completion

It is a very good way to get people started in gum and pique their interest. I'll be testing out this method in the upcoming weeks to see if it will work well for teaching in a weekend workshop setting.

Jeremy;707528 said:

Christina Anderson has just posted a quick overview on a lossy method (i.e. you will lose tones) of creating digital negatives for printing gum over at AlternativePhotography.com

http://www.alternativephotography.com/articles/art121.html

Click to expand...

I think it is interesting to note the first sentence of the next to last paragraph:

"This is a very brief summary of making a gum print, and perhaps serves the purpose only to whet the appetite, as each paragraph herein could be an entire chapter."

Jeremy;707940 said:

Yep, I loved that, too, Don, and hopefully that means she KNOWS that each is a chapter because she has already written them and her gum book is close to completion

Click to expand...

I don't know the exact status on her book but I think it needs more oven time if I had to guess.

It is a very good way to get people started in gum and pique their interest. I'll be testing out this method in the upcoming weeks to see if it will work well for teaching in a weekend workshop setting.

Click to expand...

In my two and 1/2 day tri-color gum workshops, I spend about a half day or so showing the class how to build a curve using PDN. I have all of the curves Prue-made for the class so that everything is dialed in to allow the students to start printing as early as possible in the workshop.

I do demonstrate to the class how the cyanotype curve can be used as a generic curve and that demos how effective a custom curve works vs. the generic. Even so they can take home all the curves and produce prints with them - for better or for worse.

I try to inter-leave the technical presentations between hands on activity, keeping people moving and on their feet as much as possible. By the beginning of the last day I try to stand back and let the student go at it intervening when they need guidance or when a teaching opportunity presents it self regarding the prints that are being made.

But hey, what do I know. I'm just a neophyte.

Hi Art

I have purchased large roll of BW film ISO 25 ortho to run on my Lambda, As well I have secured a vendor to make a Jobo style processor to make 30inch x 46 inch film. I plan to be making large negs for a variety of purposes.
Targets
Cyanotype
Platinum
POP
Colour Carbon
BW Carbon
This will be a real film process with great control/