Re: I'm back! Hi to all + Silane?
That should be Martin Mueller I presume - I came across with this: http://www.usask.ca/lists/alt-photo-process/2005/mar05/0088.htm Thanks for the info and procedures. May try this later -> it looks complicated (I don't have a pH meter) and I'm not sure if I can find the necessary chemicals. On the other hand, I can easily find 3-aminopropyltriethoxysilane here in Istanbul (as the hardener component of chemically curing JOTUN SeaLion yacht paint). Don't you think plain high bloom gelatin may adhere to alkali cleaned / silanized glass better? Regards, Loris. 15 Haziran 2008, Pazar, 9:11 pm tarihinde, Ryuji Suzuki yazmış: > Welcome back! > > In my understanding, Martin first introduced silane to this > group and he probably has lots of info to share with you. > > If your goal is to achieve good adhesion on glass, I suggest > trimellitiated gelatin, or at least phthalated gelatin, mixed > with regular gelatin. As a substrate for cyanotype, acid > treated pigskin gelatin of high molecular weight is probably > best (if avg MW is not indicated, go for very high bloom > strength), as this type of gelatin has very strong wet > membrane strength. Acid treated pigskin gelatin can be readily > trimellitiated or phthalated. By mixing about 1/4 to 1/2 of > either of these modified gelatin, adhesion of gelatin to glass > is greatly improved. You don't want to use 100% modified > gelatin because organic hardeners like glutaraldehyde cannot > crosslink 100% modified gelatin at all. > > If you have a choice, trimellitiated version offers better > adhesion even at a smaller proportion. Trimellitic anhydride > is also easier to use, although it probably has higher risk of > triggering asthma. (Be careful- don't inhale the dust!) > > See this page for more details: > > http://silvergrain.org/wiki/Acylated_gelatin > > If you are using trimellitic anhydride, you can add it in dry > form, without first dissolving in acetone. > > Silane modifies glass surface rather than gelatin, and most > likely can be combined with this modified gelatin technique > with advantage. > > -- > Ryuji Suzuki > "The truth that I am seeking is in your missing file." > (Bob Dylan, Something's Burning Baby, 1985) > > > From: Loris Medici <mail@loris.medici.name> > Subject: I'm back! Hi to all + Silane? > Date: Sun, 15 Jun 2008 20:46:09 +0300 (EEST) > >> Hi to all, >> >> I'm (finally) back home after 6 months of military service. >> >> As you can easily understand, I'm craving for taking photographs and >> making alt prints. My current priority is working with glass; during >> summer, I want to make cyanotypes and gum prints on glass. >> >> Browsing the internet, I came across with compounds with the generic >> name >> "silane". What I understand is that silane compounds can be used as >> intermediate material, to help alt process emulsions (or gelatin >> primers) >> adhering to glass. >> >> Is there anyone using silane for such purposes? What is your procedure? >> >> (My plan is to silanize the glass - which is a self-assembly process as >> I >> understand it - then coat it with hardened gelatine and then put the alt >> process emulsion on top of this sandwitch...) >> >> What are your suggestions? >> >> Thanks in advance, >> Loris. >> >> P.S. I'm very happy for being around again!
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