----- Message d'origine ----- De: İbrahim Pamuk <ibrahim.pamuk@xxxxxxxxxxxxx> Date: Wed, 15 Aug 2007 11:54:01 +0300 Sujet: [pure-silver] Re: Contrast paper developer À: <pure-silver@xxxxxxxxxxxxx> >Hi, > >After getting the idea of faded dichroïc filters, I have checked with below >lens filters. It seems that the below lens filters are more dense based on >grade 4.5 and 5 but I have seen little effect when printed seperately. So >being dense or darker means fading or actually they may allow about same >wavelength? Any comments? > >Regards > > >Ibrahim Pamuk Faded filters are visually less dense but the filters for use below the lens are usually tinted in the mass while those usually in color/multigrade heads are dichroïc (i.e. a very thin deposit on the filter's surface reflects the undesired wavelengths). Due to this technological difference, comparing them visually is not evident, you should print with both to see their respective effects. If you don't have a sensible difference, then your enlargers' filters are not faded (or both are !) and the problem is elsewhere. Try to print the same negative on your condenser enlarger *without* filters. If it prints on the soft side then your normal development time is probably to short and this is more evident when using a diffused light. If it prints normal or on the hard side, then I don't know, as 2-3 grades difference between a diffused and condensed light seems to much. Just one more question, I suppose your condenser enlarger uses a tungsten bulb and your diffused enlarger a halogen bulb, am I right ? Good luck, Claudio Bonavolta http://www.bonavolta.ch ============================================================================================================To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.