Christina, happiness for their new web.
Do I have Formol to 40% or formaldehyde, How could it substitute for
paraformaldehyde of their it formulates of developing lith?,
Thank you
Pardon for my English, text translated by computer.
-----Mensaje original-----
De: Christina Z. Anderson [mailto:zphoto@montana.net]
Enviado el: miércoles, 21 de junio de 2006 17:22
Para: Alt, List
Asunto: lith printing formula
OK here goes:
Here is a lith developer formula I have, called ID 85:
Solution A
Water @ 125F 500ml
Sodium sulfite 36.5g
Boric acid crystals 9.4g
hydroquinone 28g
potassium bromide 2g
water to make 1000ml
Solution B
water @ 90f 500ml
sodium bisulfite 11g
sodium sulfite 1g
paraformaldehyde 37.5g
water to make 1000ml
My question is this: on this list someone suggested to replace the
paraformaldehyde with acetone, in the ratio of 2.2ml acetone for each gram
of formaldehyde, thus 82.5ml acetone for the 37.5g paraformaldehyde--it was
Ryuji who said this if I am not mistaken. Ryuji or others, is this really
true and of what benefit might this be to do? Does it produce as good
results? Is it safer?
This developer has been wonderful for me, but I also found this year that
the Fotospeed Lith developer did great for a bunch of students, so I am
inclined to not mix my own lith developer anymore but just use the
commercial brands. It was the first semester of teaching experimental that
I did NOT mix up my own lith developer, and, frankly, it is a pain....
Any experience is much appreciated.
Chris
Received on 06/22/06-11:08:11 AM Z
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