February 2006 Alt-Photo-Process-L: Fwd: Cyanotype

From: TERRYAKING@aol.com
Date: 02/15/06-02:26:35 PM Z
Message-id: <296.59442f4.3124e87b@aol.com>

In a message dated 15/02/2006 20:24:36 GMT Standard Time, TERRYAKING writes:

Loris

:

Forgot to ask a question related to the speed of Cyanotype-Rex.

Since you say that Cyanotype-Rex is very fast compared to traditional
formula (to the extent of being able to be used in-camera), I wonder:
1) Do you get a positive image or negative image when used in-camera? If
negative, do you think the density and color will be enough to contact print the
negative onto another Cyanotype-Rex paper (or other process)?

I get a negative image which can then be used to make a contact positive
just as one would with film. (If FP4 goes off the market maybe I will have a
stand by for architectural photography).

If positive, since the Cyanotype emulsions we know (both traditional and
new cyanotype) are only sensitive to UV, what would be the purpose of using of
it in camera? I mean one may not take photographs indoors or UV-poor days
(winter, overcast weather) if the -Rex emulsion is only sensitive to UV like the
former variations

Right from the very beginning it has not been true that cyanotype is only
sensitive to UV (see Herschel's notes in the 1840s). At our Oxford conference,
the Object Glass of Science, last September we were getting three minute
exposures under dull cloudy skies. This September we are combining the
conference with APIS 2006.

Incidentally, this is why we said that our retro-Invention programme was
revolutionary.

2) Can we use it under enlarger? (If it's a positive-negative process then
this may be a very good advantage - saving us for making enlarged negatives.)

I don't know yet.

Terry

Terry King FRPS

RPS Historical Group (Chairman)

_www.hands-on-pictures.com/_ (http://www.hands-on-pictures.com/)

Moderated Discussion Group

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1. An excellent thing is as rare as it is difficult.(Spinoza)
2. A man's reach should be beyond his grasp or what's a heaven
for.(Browning)
3. Frustra fit per plura quod potest fieri per pauciora.(Occam's razor or
'Keep it simple!').
4. Nullius in Verba (Horace), 'Take no man's word for it' (motto of the
Royal Society).
5. If ignorance is bliss, why are not more people happy ? (anon)

Terry King FRPS

RPS Historical Group (Chairman)

_www.hands-on-pictures.com/_ (http://www.hands-on-pictures.com/)

Moderated Discussion Group

Post message: artaltphot@yahoogroups.co.uk

Return-path: <TERRYAKING@aol.com>
Date: Wed, 15 Feb 2006 15:24:36 EST
From: TERRYAKING@aol.com
Subject: Re: Cyanotype
To: alt-photo-process-l@sask.usask.ca
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Loris

:

Forgot to ask a question related to the speed of Cyanotype-Rex.

Since you say that Cyanotype-Rex is very fast compared to traditional
formula (to the extent of being able to be used in-camera), I wonder:
1) Do you get a positive image or negative image when used in-camera? If
negative, do you think the density and color will be enough to contact print the
negative onto another Cyanotype-Rex paper (or other process)?

I get a negative image which can then be used to make a contact positive
just as one would with film. (If FP4 goes off the market maybe I will have a
stand by for architectural photography).

If positive, since the Cyanotype emulsions we know (both traditional and
new cyanotype) are only sensitive to UV, what would be the purpose of using of
it in camera? I mean one may not take photographs indoors or UV-poor days
(winter, overcast weather) if the -Rex emulsion is only sensitive to UV like
the former variations

Right from the very beginning it has not been true that cyanotype is only
sensitive to UV (see Herschel's notes in the 1840s). At our Oxford conference,
the Object Glass of Science, last September we were getting three minute
exposures under dull cloudy skies. This September we are combining the
conference with APIS 2006.

Incidentally, this is why we said that our retro-Invention programme was
revolutionary.

2) Can we use it under enlarger? (If it's a positive-negative process then
this may be a very good advantage - saving us for making enlarged negatives.)

I don't know yet.

Terry

Terry King FRPS

RPS Historical Group (Chairman)

_www.hands-on-pictures.com/_ (http://www.hands-on-pictures.com/)

Moderated Discussion Group

Post message: artaltphot@yahoogroups.co.uk

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<BODY id=role_body
style="FONT-SIZE: 14pt; COLOR: #000000; FONT-FAMILY: Garamond" bottomMargin=7
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<DIV>
<DIV>
<DIV>Loris</DIV>
<DIV> </DIV>
<DIV>:</DIV>
<BLOCKQUOTE style="PADDING-LEFT: 10px; MARGIN-LEFT: 10px"><FONT
  style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow" size=3>Forgot to
  ask a question related to the speed of Cyanotype-Rex.</FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow" size=3>Since you
  say that Cyanotype-Rex is very fast compared to traditional formula (to the
  extent of being able to be used in-camera), I wonder:</FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow" size=3>1) Do you
  get a positive image or negative image when used in-camera? If negative, do
  you think the density and color will be enough to contact print the
  negative onto another Cyanotype-Rex paper (or other
  process)?</FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><STRONG><FONT face="Arial Narrow" size=3>I
  get a negative image which can then be used to make a contact positive just as
  one would with film. (If FP4 goes off the market maybe I will have a stand by
  for architectural photography).</FONT></STRONG></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow" size=3> If
  positive, since the Cyanotype emulsions we know (both traditional and new
  cyanotype) are only sensitive to UV, what would be the purpose of using of it
  in camera? I mean one may not take photographs indoors or UV-poor days
  (winter, overcast weather) if the -Rex emulsion is only sensitive to UV like
  the former variations</FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3><STRONG>Right from the very beginning it has not been true that
  cyanotype is only sensitive to UV (see Herschel's notes in the 1840s). At our
  Oxford conference, the Object Glass of Science,  last September we
  were getting three minute exposures under dull cloudy skies.
  </STRONG></FONT></SPAN><SPAN class=078260815-15022006><STRONG><FONT
  face="Arial Narrow" size=3>This September we are combining the conference with
  APIS 2006.</FONT></STRONG></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><STRONG><FONT face="Arial Narrow"
  size=3></FONT></STRONG></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3><STRONG>Incidentally, this is why we said that our retro-Invention
  programme was revolutionary. </STRONG></FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow" size=3>2) Can we
  use it under enlarger? (If it's a positive-negative process then this may be a
  very good advantage - saving us for making enlarged
  negatives.)</FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow" size=3><STRONG>I
  don't know yet.</STRONG></FONT></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><STRONG><FONT face="Arial Narrow"
  size=3></FONT></STRONG></SPAN> </DIV>
  <DIV><SPAN class=078260815-15022006><STRONG><FONT face="Arial Narrow"
  size=3>Terry</FONT></STRONG></SPAN></DIV>
  <DIV><SPAN class=078260815-15022006><FONT face="Arial Narrow"
  size=3></FONT></SPAN> </DIV></FONT></BLOCKQUOTE></DIV>
<DIV></DIV><FONT size=4></FONT></DIV>
<DIV> </DIV>
<DIV><FONT lang=0 face=Arial size=2 FAMILY="SANSSERIF" PTSIZE="10">Terry King
FRPS<BR><BR>RPS Historical Group (Chairman)<BR><BR><A
href="http://www.hands-on-pictures.com/">www.hands-on-pictures.com/</A>
<BR><BR>Moderated Discussion Group<BR><BR>Post message:   
artaltphot@yahoogroups.co.uk<BR><BR>Subscribe:    
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face=Arial color=#000000 size=3 FAMILY="SANSSERIF" PTSIZE="12"><BR></FONT><FONT
lang=0 face=Arial color=#000000 size=2 FAMILY="SANSSERIF" PTSIZE="10">1. An
excellent thing is as rare as it is difficult.(Spinoza) <BR>2. A man's reach
should be beyond his grasp or what's a heaven for.(Browning) <BR>3. Frustra fit
per plura quod potest fieri per pauciora.(Occam's razor or 'Keep it simple!').
<BR>4. Nullius in Verba (Horace), 'Take no man's word for it' (motto of the
Royal Society).<BR>5. If ignorance is bliss, why are not more people happy ?
(anon)</FONT></DIV></FONT></BODY></HTML>

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Received on Wed Feb 15 14:29:54 2006