Re: 2 tricolor gums
Hi Keith, Yesterday evening I tried to oil the 18lb paper. It becomes almost transparent (looks like semi-transparent ground glass) and the paper texture is much less prominent to the eye; pretty appealing... Probably the exposure time will be something like 1 (or 1.5 at max.) stop slower than inkjet transparency, instead of the 2.5 stops figure when used non-oiled. (Have to test it; but that's how I feel looking at it.) I have two important issues with those paper negatives; they doesn't hold much ink, therefore: 1. I have to use plain paper profile in the printer, which has a quite coarse dithering pattern = not sharp and harsh to the eye. 2. The ink amnt. isn't enough to successfully block UV with colorized negatives, even for Cyanotype (= an exposure scale of log 1.5) but I want to use colorized negatives, hoping I'll get smoother results. (Black ink is unnecessarily dense -> causing grainness in the highlights.) Will play with different paper profiles. My aim is to be able to print Cyanotype (ES = 1.5) with those paper negatives; if I can manage to block enough UV with a more suitable paper profile, then I will also oil the negatives, because Cyanotype requires something like 47 to 60 minutes exposure to print full scale (= 15 discernible steps, ES log 1.5) with non-oiled paper negative base, and I want to reduce this to something like 20 minutes... Regards, Loris. 1 Aralık 2008, Pazartesi, 1:23 pm tarihinde, Keith Gerling yazmış: > I had no experience judging paper weight!! But yes, I do feel rather > silly wondering why the 24lb was so slow. Being thinner, the 18lb > absorbs less ink and the negs are perfect un-oiled. > > The NuArc is great (thanks Erie!!). The vacuum doesn't work, but I do > gum - I don't need no steenking vacuum! > > 2008/11/21 Loris Medici <mail@loris.medici.name>: >> First of all congratulations on your new light source. Does the vacuum >> frame work? If yes that's definitely a very nice setup then -> I want >> one >> also! I hope I will have some time soon, to build mine... >> >> Whoa!? That makes me laugh when thinking about all that speculation we >> did >> on exposure times before :) >> >> Regards, >> Loris.
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