Archived posting to the Leica Users Group, 2003/10/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thank you Adam. I'll try the Technidol first. Best regards, Roland Oakland, California - ----- Original Message ----- From: "Adam Bridge" <abridge@mac.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Saturday, October 04, 2003 10:24 PM Subject: Re: [Leica] Kodak Technical Pan 35mm Film > On 2003-10-04 roland@dnai.com (Roland Smith) thoughtfully wrote: > > >Does anyone use this film or have experience with it for general photography > >and especially landscapes? > > > >I want to try this film and am not sure what developer to use and for what > >duration for the development at 20c. Please advise the ISO it yielded. > > I use technical pan in the developer specified by Kodak for photographic use: > Technidol. It comes in little packets that you mix up on a case by case basis > which makes it a bit expensive. > > I've been shooting it at 25 - it has extremely fine grain. I follow the > development instructions religiously. > > Now if you look back in the archives, maybe a year or so, you'll fine some folks > who process it with their own chemistry and get a speed of 100 or so. It's a > LITTLE more grainy but very impressive. I think one of the guys is from the > North Bay area. > > It was Richard Comen who was doing it. Here's what he wrote back in 2001 (wow > longer than I thought) > > I hope this helps. I like tech pan and intend to be doing some more photography > with it in the next month or so. > > > -------- > > > Adam, if you are interested in experimenting further with Tech Pan you > might try the following brew which I formulated after many years of > experimenting. I now use Tech Pan exclusively for everything but low light > photography. I shoot it at iso 100. It works beautifully with the split > filtration enlarging. If you try it, let me know what you thin,. > > Richard > Mendocino CA > > Directions for Pota-HC110 developer for processing Tech Pan at ASA 100: > > In 300 ml hot water mix 1 tablespoon Sodium Sulfite and 1/8 teaspoon > Phenidone . I use the set of plastic measuring spoons that come in a set > for kitchen use. To the above add 2 ml. HC110 syrup ( measure with a > child's medicine syringe found at any pharmacy ). > > > > 2 > > The measuring spoons mentioned above are just fine, extreme accuracy is > not necessary. Filter through coffee filter that is placed in a funnel. > Cool to 69 degrees F. Use stainless nikkor tank for one roll only. Discard > developer after one roll, ( Phenidone developer oxidizes rapidly and should > be discarded after one roll). I place tank in a tray of water that is 69 > degrees to keep temp constant. Develop for 6 minutes. After filling tank, > rap tank to dislodge air bubbles, then give one gentle inversion over and > back. Place tank in water bath of 68 degrees. Agitation: Do not agitate > until beginning of third minute and at that time one gentle inversion over > and back. Repeat at top of each remaining minute. At end of 6 min., drain, > use short stop, and follow with rapid fix for aprox 2 min. Wash as usual, > rinse in distilled water for final rinse, then instead of foto flow, pour > in rubbing alcohol ( I prefer it to foto flow. It is often on special at > pharmacies for 39 cents a bottle ). Let sit in alcohol for a minute or so, > discard alcohol and hang film to dry ( no squeegee or sponges as that is a > terrible thing to do to wet film). Hang in dust free place. Because of > variations of meters, camera shutters, thermometers, and other variables, > you might want to adjust your time of development slightly. > > Since concocting the above brew formula, I have found that it simplifies > life to mix 3 liters of the above brew ( use 10 x the brew formula ), > filter as above and pour into 8 Oz. Brown glass bottles obtained from a > pharmacy. Fill each bottle so that there is no air and screw on top > tightly. I have found that using my last bottle 6 months after mixing gives > the same results as with the first bottle used right after mixing. All I do > is place a bottle into 69 degree water bath and when brew reaches the bath > temp, I pour it into the tank. > > ASA 200 can be achieved by increasing the developing temperature to 70 > degrees F. and following the rest of the above procedure. There will be a > loss in shadow detail however. > > The above gives me the best negatives I have ever made and they print > beautifully. The negs may appear a bit thick to some but with split > filtration even the most dense appearing highlights print beautifully. The > beauty of Tech Pan is that one can take a small portion of the neg and > enlarge it to 11X14 with very little loss in quality. In full negative > printing the detail is exquisite unlike no other film I have ever used. > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html