Archived posting to the Leica Users Group, 2002/04/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I personally make all of my Cibachrome prints up to 20x24. I have to go out for 30x40's. Hopefully this will change in the future. There are numerous types of Cibachrome Classic paper. Resin Coated (RC) in medium contrast. This is not classed as a 200 year+ archival paper. The medium contrast emulsion is Ilford's latest emulsion and is spectacular. And there is Polyester paper. Polyester paper is the expensive stuff, 2.5 times the cost of RC paper. It comes in three contrasts, low, medium, and normal. Low and normal come in sizes up to 30x40. I mostly buy it (low and normal contrast) in 20x24 size and cut it down for 16x20 and 8x10 prints. I also buy it in 11x14 as it is wasteful to cut 11x14's out of 20x24 stock. Polyester based medium contrast paper only comes in sizes up to 16x20. Ilford's best emulsion and they supply it only up to 16x20 on the archival polyester base. But you can buy it in 20x24 on the RC base. This makes no sense whatsoever!!! It is the polyester normal contrast that is archival to 200+ years. The low and medium contrast emulsions on the polyester base are close, but not quite as good. Followed by the RC paper base. I buy my Ilfochrome paper from B&H as they seem to always have fresh stock in all sizes. And their prices are the best. I find printing on Cibachrome Classic paper very rewarding as it is easily manipulated via dodging and burning and various masking techniques allow you to attain the exact result that you want. Assuming it is in the transparency in the first place. Filter packs are always low. 15M+10Y is typical. A 5cc change is very subtile so there is a lot of room to work. And with the low and medium contrast surfaces, masking is not normally needed. The P3 chemistry that I use is basically odorless, all clear (no nasty ferricyanide or the like), and lasts easily six months in my processor without even a hint of going bad. I mix 15 liters at a time and use it as needed until all 15 liters are used. Then I mix another 15 liters. I've never had to dispose of unused P3 chemistry. As I said, I've used a single batch for a period of six months (June-December 2001) and the filter pack didn't change. P3 chemistry can be mixed in any amount from the 20 liter kit. As little as 500cc if you wish. The P3 chemistry is w-a-y w-a-y better than the P30 chemistry. It's about 1/10th the cost and will last for a very long time, especially the concentrates. Use JOBO Protectan to displace the oxygen in the concentrate developer bottle after using what you need from it. It will last a year or more that way. Since Ciba now comes in three contrasts, masks are rarely needed. They are needed in commercial labs since they all use Ilfochrome Rapid which only comes in the high contrast (labeled normal) version. Ilfochrome Classic comes in low, medium, and normal (high) contrast versions. The medium and low contrast emulsions have tamed the color spectrum in that everything gets equal billing. Any enlarger with a dichroic color head is sufficient. Used enlargers are in the $100 to $500 range depending upon the model. Get a good lens, APO Schneider or APO Rodenstock if you can. A four blade easel large enough for the largest print size you will make. Get a laser enlarger alignment tool. The "Parallel" is what I use and it is inexpensive for what it does. See the article in the current (May-June) Photo Techniques magazine page 52. You will also need to control your water temperature fairly accurately. 86 deg +/- 1/2 deg. Get a used thermal control valve such as a Delta 1 or a Leonard (www.leonardvalve.com .) I use a Hass Intellifaucet D250 which is one of the best darkroom investments I have ever made! www.hassmfg.com I use a JOBO processor but JOBO type drums and a roller base will work as well. Used JOBOs are very cheap now. All used darkroom equipment is cheap now. Jim - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html