Re: cyano on gessoed Al
Rajul, thanks for the update. I'm very interested in the agar-agar stuff -> seems to be useful for other things too (sizing paper - from Alberto Novo - and non-toxic carbon - from Halvor Bjoengaard)... I currently wait for Henk coming back from his trip -> will continue trying with "beer coating" after hearing back from him. Regards, Loris. 9 Nisan 2009, Perşembe, 10:53 pm tarihinde, Rajul yazmış: > To all Al friends, > > This is a preliminary observation but I have been able to do cyano on > gessoed Al sheets. > > I added finely sieved Aluminum oxide (Al2O3) to the diluted gesso, > and applied multiple coats of it > to achieve the desired opacity. Al2O3 killed the super white of the > gesso, provided tooth, and did not increase the pH. After drying and > lightly sanding coated sheets, I applied 1% agar, and dried them > overnight. I still have to improve on the smoothness of the agar coat > and will try 0.5%. As expected, agar provided the porosity that aids > cyano printing. > > A cyano mix of 1A + 2B required a 30 min exposure and printed all > details. However, on development in diluted vinegar, only the shadows > and low mid-tones stayed; all highlights washed out. > > I will size these plates and see what gum passes will do. > > Details of the process will follow once I am able to confirm my > observations. > > Rajul >
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