[alt-photo] Re: Gum over cyanotype question

[Peter Blackburn]

That's been my feelings exactly—cyano blue tends to be too intense for the other pigments in gum work.However, I think Christina has been able to pull it off nicely. I find her approachto cyano-gum as proof that the blue can be "tamed" somewhat. But much if not most other gum over cyano work I've seen is a bit objectionable for the very reason you mention, Diana.  On the other hand the intense blue might be appealing to many as they associate it with theblue of a regular cyanotype. I can only appreciate cyanotype when it has been toned. Best wishesto Henry and all those working in this area! Peter J. Blackburn

 > From: dhbloomfield at bellsouth.net
> To: alt-photo-process-list at lists.altphotolist.org
> Date: Mon, 27 Feb 2012 15:26:48 -0500
> Subject: [alt-photo] Re: Gum over cyanotype question
> 
> Yeah, I agree about the dichromate, but I also agree with Henry about  
> too much sizing-- just use the sizing in the paper--  Early on,  
> whenever I got flaking, it was because of too much pigment, though.    
> Don't know much about a cyanotype base as I never use it, but why not  
> just try a pigment for the cyan layer (to fix the cyanotype fading  
> problem).  I've never understood using a cyanotype base for gum--  
> doesn't it offer too intense a blue for the other layers (?).
> 
> 
> On Feb 27, 2012, at 3:11 PM, Keith Gerling wrote:
> 
> > How long is the gum wash?  Could you have really hard water, with
> > alkalinity that is bleaching the cyanotype?  Personally, I think  
> > your level
> > of dichromate is rather high, but then I've only used K.
> >
> > On Mon, Feb 27, 2012 at 11:23 AM, Willen, Matthew S  
> > <willenm at etown.edu>wrote:
> >
> >> Yes, with gel/glut. Maybe it's to give it shot unsized. M
> >>
> >> On 2/27/12 12:07 PM, "Henry Rattle" <henry.rattle at ntlworld.com>  
> >> wrote:
> >>
> >>> Matt - is your FA HP sized before the first coat? I sized with
> >>> gelatin/formaldehyde before starting, and found this paper got  
> >>> pretty
> >>> slick
> >>> after a coat or two.
> >>>
> >>> Henry
> >>>
> >>>
> >>> On 27/02/2012 16:21, "Willen, Matthew S" <willenm at etown.edu> wrote:
> >>>
> >>>> Hi Francis
> >>>> Fabriano Hot Press extra white, 300 lbs
> >>>> Potassium, 1 part gum, part mixed gum/pigment, 2 parts Na  
> >>>> dichromate
> >>>> Gum exposure about 8 minutes under a bank of 12 uvbl bulbs.
> >>>>
> >>>> --Matt
> >>>>
> >>>> On 2/27/12 10:57 AM, "francis schanberger" <frangst at gmail.com>  
> >>>> wrote:
> >>>>
> >>>>> These will probably help the discussion:
> >>>>>
> >>>>> What paper are you using?
> >>>>> What is the gum sensitizer mixture? (ammonium or potassium  
> >>>>> dichromate)
> >>>>> (1:1
> >>>>> or ?)
> >>>>> How long is your gum exposure?
> >>>>>
> >>>>> -francis
> >>>>>
> >>>>>
> >>>>> --
> >>>>> francis schanberger
> >>>>>
> >>>>> www.francisschanberger.com
> >>>>> _______________________________________________
> >>>>> Alt-photo-process-list | http://altphotolist.org/listinfo
> >>>>
> >>>> _______________________________________________
> >>>> Alt-photo-process-list | http://altphotolist.org/listinfo
> >>>
> >>>
> >>> _______________________________________________
> >>> Alt-photo-process-list | http://altphotolist.org/listinfo
> >>
> >> _______________________________________________
> >> Alt-photo-process-list | http://altphotolist.org/listinfo
> >>
> > _______________________________________________
> > Alt-photo-process-list | http://altphotolist.org/listinfo
> 
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo