Re: The Chiba System
I have been testing the direct carbon-gelatin method and it looks promising. Finally zero-chrome printing is there!
Some first observations:
- It works!
- Working with gelatin and ferric ammonium citrate shows the true colors of the pigments , when coating, which is very strange when used to gumprinting. Feels like forgetting something.
- Brush coating with hot pigmented gelatin is a lot more difficult then coating gum. Expirimenting with other coating methods is needed. Coating in a warm darkroom is easier the in a cold one.
- Even when the coatingt looks smooth to the eye the final print still shows brush streaks
- 'development' is fast and easy, but there is less manipulation possible
- unsized papers print rather well
- I had better results with 6% gelatin then with 3% gelatin, it also holds more pigment
- It is less light sensitive then gum. For gum my exposure times are between 2-4 minutes for chiba-gelatine it was 10-16 minutes. I did no ph => 4 correction though.
- final results look more 'gritty' then gumprints, maybe this has a relation with airbubbles during coating (or in the peroxide bath maybe)
I will test some more soon.
PS direct dowload spots for Halvor's Chiba System are also on my site:
Low res pdf: http://polychrome.nl/file_download/3
Hi res pdf: http://polychrome.nl/file_download/4
On 23-mrt-2007, at 17:57, Halvor Bjørngård wrote:
I have put up some web pages with my thesis. Suppose most people here have