Re: My first attempt - digital negatives.

It might depend if Ehud is using a "colourized" negative or just just red
and yellow? Agreed the magenta is just adding density.

----- Original Message -----
From: "Joe Smigiel" <jsmigiel@kvcc.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Friday, February 11, 2005 11:39 AM
Subject: Re: My first attempt - digital negatives.

> I'm not sure you need that 70 magenta in the colorhead. If the negative
> contrast is adjusted in Photoshop correctly using curves before output,
> you shouldn't need to filter for the paper contrast. After all, that's
> what the curves are used for in the digital negative workflow. Without
> filtration in the enlarger I suspect you will gain at least one stop of
> exposure and cut your printing times accordingly to a more managable
> level. Bringing the enlarger lamphouse down so the projected area of
> illumination just covers the contact print frame may also give you a
> significant decrease in exposure time.
>
> Joe
>
> >>> mkochsch@shaw.ca 02/11/05 10:14 AM >>>
> Ehud Yaniv wrote:
> > Hi everyone,
> >
> > I have been trying to make digital negatives for silver printing,
> > while I am learning photography and until I can move to alt-processes.
> >
> > I have been using Pictorico High Gloss White and the Dan Burkholder
> > Inkjet Companion template with an Epson 1280 printer and stock inks.
> > So far I have made 4 negatives and yesterday I got to try to print
> > one during my basic darkroom class.
> >
> > I have not yet made a final print due to the end of class but I was
> > up to 5 minutes and 20 seconds with 70 magenta in the colour head of
> > the enlarger at f4 and 50 mm lens. The enlarger height was set to 70
> > and the light was focussed through an empty 35 mm film holder.
> >
> > My question, is this length of time unusual? I think I still need to
> > add about 20 % more time to get some separation between the 0 and 5 %
> > on the included step wedge.
> >
> > Any suggestions would be gratefully accepted as I have limited
> > darkroom time as I still need to do assignments to complete the
> > course.
> >
> > Ehud
> >
> > PS: Yesterday I learned to dodge and burn for the first time. It was
> > actually quite wonderful to make some fine changes to a photograph.
> > That is to say, to have some - limited, control. I still felt like I
> > was all thumbs.
> >
> > __________
> > Ehud Yaniv
> > Still Light Photography
> > www.still-light.com
>
>
> Ehud, your print times will go down but will you see any difference in
> quality by switching to OHP? Probably not, since base + fog is what is
> changing. If printing faster is absolutely neccessary then go ahead and
> switch. If you can open up a stop or two try that, or switch to a higher
> watt bulb. e.g. go to a 150 or 225 watt enlarger bulb.
>
>
Received on Fri Feb 11 12:03:17 2005