On Sunday, February 26, 2012 10:52:25 AM charles green did opine: > what does "IOW" mean? > In Other Words
> so use mineral pigments rather than organic dyes. mineral pigment > encodings of hundreds of years age are bought and sold for vast piles > of money, implying stability. But not with the purity of color available from the organics. That, and cost + environmental concerns more or less doomed the Cibachrome process, which attempted to use mineral and metallic dyes to make archival quality color prints. The prints didn't fade, there some on public display that have been hit with the sun for hours a day that still look fine, no discernable fade in 50 years, but the paper was about $12 an 8x10 sheet, the chemistry was another item you had to budget for, and according to Ciba, needed some sort of cataly$t conver$ion to render it legally disposable. Ciba never did say what all was in it, but the starter kit of the chemistry needed was over $100 in the smallest quantity they sold. Since I could get a 6 gallon kit of the stuff I was using for about $30, toss the lye in the developer down the drain to clean it and replace it with sodium carbonate to make a good STABLE developer, and buy a 100 sheet box of paper from the freezer at the photo store for $49, the choice of darkroom process and chemistry seemed like a no brainer to me. Everybody knew color faded, at a rate determined by how much actinic light hit it and how much of the chemistry was dried into the paper, and extra washing reduced that latter problem by quite a bit. So I washed the finished prints in slowly running water for an extra amount of time that depended on how long it took to get the next print ready to wash, 20 to 30 minutes most evenings. And my prints have lasted way better than any commercial processors prints have. Now we have digital cameras and printers that can easily beat those 1970 prices quoted above, with inks that can easily outlast the color prints of the 70's. They aren't cheap, a full set of durachrome tanks for the epson NX515 printer sitting next to me are over $85 and if doing hires color prints on matted finish paper, won't last past a 25 sheet pack on that good paper, so the costs are higher on a per 8.5x11 borderless sheet, but the color can be as good as that 1975 print ever was if one is willing to tweak the drivers settings to optimize, and the finished print will outlast the 1975 chemical version by 50 years or more. Given the devaluation of the dollar since 1975, I'd say costs are a tossup. The biggest quality problem at the end of the day is still the camera,'s fault. The poor resolution of the sensors used in 'commodity' cameras in the $300 price bracket (10-13 megapixels) has allowed the lens people to get equally sloppy, so the ability to enlarge that picture, picking the great pix out of the middle of the frame and cropping away the rest and still be able to hand out a razor sharp 8x10 has been lost except for the $5000+ Nikon's and Rollie's you and I can only dream about, only Olan Mills can afford those. We won't get that ability back until the $300 camera has 10 gigapixel + capable sensors in it. By then it will be a $1000 camera given the progress in the state of the art and the devaluation of the dollar. :( I'd like to see it happen, but I doubt if I have that much time left as I figure that will be at least another decade or more. Emphasis on the more I fear. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Q: How many Marxists does it take to screw in a light bulb? A: None: The light bulb contains the seeds of its own revolution. ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
