Re: Anybody experimented with Argyrotypes?
I must add that colloidal silver prints toned in noble metals are also pretty stable - given the toning was done thoroughly. If you screw up w/ pt/pd prints, you put dollars in the trash. On the other hand, you can tone a successful colloidal silver print in a noble metal toner of your choice w/o risking to trash precious noble metals. If you screw up with the silver print you can trash it more easily and then restart, iterate until you have a print worth to tone... But it must be noted that about half the cost of a fine print will come from paper, not chemistry only! 28 Nisan 2009, Salı, 12:18 am tarihinde, Loris Medici yazmış: > Fernando, pt/pd is an acronym(?) for Platinum/Palladium printing. It's > similar to Argyrotype - where the light sensitive compound is an iron salt > (albeit different one/s), but in the Platinum/Palladium process the image > is formed by colloidal noble metals: pure palladium or platinum/palladium > mixture or pure platinum (pure platinum prints are somehow harder to do > BTW...) In Argyrotype the image is formed by colloidal silver. The > advantage of pt/pd is that the image is very stable compared to silver, > the disadvantage is price -> colloidal silver images cost in terms of > cents but pt/pd images will cost you in terms of dollars (not taking paper > into account)... Also, I (subjectively) like more the tonality I can get > from pt/pd prints. > > Regards, > Loris. > > > 27 Nisan 2009, Pazartesi, 11:29 pm tarihinde, fernando cruz florez yazmış: >> Loris, >> I've been following this thread with interest... great tips and good to >> see >> others also experimenting with these processes. >> >> I was just wondering what you were referring to with "pt/pd". I get the >> feeling it's going to be another technique to look into ... >> >> >> 2009/4/21 Loris Medici <mail@loris.medici.name> >> >>> I see. Let's hope Sam's nice suggestion works for you then -> if you're >>> still interested in making Agryrotypes, that is. Also definitely try >>> COT >>> 320 (for whatever iron process), it's a really good paper. (If they >>> didn't >>> changed it!) I was happy with my Argyrotypes because I was always >>> toning >>> them with gold (which is pretty good priced in my location) -> which >>> would >>> give convincing blacks almost every time... Never liked the results I >>> was >>> getting with selenium and Vandykes (too yellow for my taste) therefore >>> I >>> never tried to tone my Argyrotypes in selenium. I would prefer pt/pd >>> every >>> time against Argyrotypes - no question! (Ease and quality.) >>> >>> Is there any on-line gallery showing those prints? >>> >>> To anyone: please let me know if you're coming to Istanbul/Turkey. I'd >>> like to meet (and provide any help you need - if I can - with utmost >>> pleasure). >>> >>> Regards, >>> Loris. >>> >> > >
|