Re: [Largeformat] TMax and Pinholes

[Clive Warren <cocam@cableinet.co.uk>]

At 6:20 pm +0000 12/9/00, 1990lt5@digizen.net wrote:
>
>I have just started using 4X5 after many years with 35mm and 120. It
>seems that about every 4th or 5th negative I develop has a single
>pinhole (tiny clear spot with no density-never in the same area). 
>I'm using Tmax 100 with a Readyload holder developing in Xtol 1:1
>tray processed one sheet at a time.  At first I thought I had a
>problem with my Stop bath (Kodak Indicator mixed 1:43) so switched to
>a water rinse Stop but have gotten single pinholes using both
>approaches.  Boy would I be grateful for some suggestions.  While I'm
>getting some experience with what Tim Rudman "The Photographer's
>Master Printing Course" calls "knifing" it is certainly not something
>I want to become expert at. HELP! Rick Jones

Rick,

A couple of suggestions - the problem may be due to air bubbles or 
the water used to mix the dev. Try using a wetting agent in with the 
dev. and if you are not doing so already, use distilled water to mix 
up your dev solution.

Hope that helps.

-- 
All the best,

             Clive Warren   http://www.f32.net
                            Large Format travel and stock photography