Re: VDB is "Brownprint" process?

Re: VDB is "Brownprint" process?Thank you, Sandy- it was confusing there for a while...
Susan
  ----- Original Message -----
  From: Sandy King
  To: alt-photo-process-l@sask.usask.ca
  Sent: Thursday, February 23, 2006 5:37 AM
  Subject: Re: VDB is "Brownprint" process?

  The way most of us use the terms today, vandyke/brown print means a print made using some form of ferric ammoniuim citrate ( or a mixture of FAC with ferric citrate), while kallitype is made using ferric oxalate.

  The Kodak step wedge is slightly wider than the Stouffer T2115, but for our purposes the less expensive Stouffer works every bit as well. Or, if you want a larger one, try the TP45, which is a 4X5" step wedge. I use this a lot for film testing.

  Sandy

    Hi Loris,
    I don't have the Jame's book handy right now- it is in the darkroom- but; is the 'brownprint' called ?"Kallitype"...
    I am interested in knowing as I bought the kit over the 'phone' from the Formulary and will try it out when it gets here in one month.
    BTW; does one need a 21 step wedge for alternative processes and how does one use it?
    I went into the store yesterday and found out the Kodak step wedge costs $144. US and the Stouffer wedge costs $5.80 US- a big difference in price, any difference in quality?
    Thanks so much,
    Susan

      ----- Original Message -----
      From: Loris Medici
      To: alt-photo-process-l@sask.usask.ca
      Sent: Thursday, February 23, 2006 4:09 AM
      Subject: RE: VDB is "Brownprint" process?

      I must include that the process needs negatives with much less density range when compared to Vandyke. Since dmax is step 10 and dmin is step 23 (first paper white step), I guess this means that the process needs negative with a density range of 1.3 (can print negatives optimized for silver-gelatine). IIRC, Vandyke needs negatives with a density range around 1.9 - this is a considerable difference!

      Regards,
      Loris.

      -----Original Message-----
      From: Loris Medici [mailto:mail@loris.medici.name]
      Sent: 23 S¸ubat 2006 Pers¸embe 13:52
      To: 'alt-photo-process-l@sask.usask.ca'
      Subject: Re: VDB is "Brownprint" process?

        ...

        In short:

        1) It's not true that the process is a DOP. I got a very strong print-out.
        2) Exposure time is very short: If my calculations are correct, with my setup, 45 secs. exposure will be enough to reach dmax!!! (Since steps 1 - 10 were dmax with 6 mins. exposure, 1/3 x 9 = 3 -> 2^3 = 8, 6 / 8 = 0.75 -> 45 secs would be still enough for step 1 reaching dmax - please correct me if I'm wrong here!) This is very fast when compared to my 8 mins. Vandyke standart printing time (for double coated paper) with the same lightsource and frame.
        3) Density is weak compared to single coated Vandyke (will try double coating this evening).
        4) Color is different compared to Vandyke; it's less red, a milky-brown. Vandykes are reddish brown.

        ...
Received on Sat Feb 25 18:39:42 2006