Salted and albumen paper more warmer in hot summer?

[stefano_ber]

Has anyone like me noticed that in a hot summer the tones of the salt and albumin prints have a decidedly warmer tone than the same ones printed in winter? same exposure and development times, the same formula of the salt, same toner and the same paper...
if this is possible, can anyone give me an explanation?

 

[nmp]

Has anyone like me noticed that in a hot summer the tones of the salt and albumin prints have a decidedly warmer tone than the same ones printed in winter? same exposure and development times, the same formula of the salt, same toner and the same paper...
if this is possible, can anyone give me an explanation?

Not surprised. What's the temperature and humidity control situation in your work environment?

 

[stefano_ber]

Not surprised. What's the temperature and humidity control situation in your work environment?

the humidity is not so high, about 50/60% the temperature about 28/30 °.
But I didn't understand if it depends on the paper or on the toner. Because it is during the toning that you see the tonal change compared to the previous ones printed in winter.

 

[nmp]

The origin of the color change might be set by the environment, may be the toner just accentuates it. Or the toner temperature can probably be playing a role - speeding or slowing the toning reaction, resulting in different extent of toning for a given length of time. I am assuming your winter temperatures are lower than summer ones. I have wild extremes in my work space so I have made myself a constant temperature / humidity chamber where I keep my paper for at least a day prior to use. I found it helps in cyanotypes - at least one variable less to worry about.

When I did my POP printing, the color did change (check the link below) with a couple of them much more neutral (which I liked better,) but I could never figure out how to reproduce it. Par for the course for alternative processes, I suppose. I would be happy if at least tonal range does not get affected appreciably from season to season...


:Niranjan.

 

[stefano_ber]

The origin of the color change might be set by the environment, may be the toner just accentuates it. Or the toner temperature can probably be playing a role - speeding or slowing the toning reaction, resulting in different extent of toning for a given length of time. I am assuming your winter temperatures are lower than summer ones. I have wild extremes in my work space so I have made myself a constant temperature / humidity chamber where I keep my paper for at least a day prior to use. I found it helps in cyanotypes - at least one variable less to worry about.

When I did my POP printing, the color did change (check the link below) with a couple of them much more neutral (which I liked better,) but I could never figure out how to reproduce it. Par for the course for alternative processes, I suppose. I would be happy if at least tonal range does not get affected appreciably from season to season...


:Niranjan.

Yes, winter is cold here, I live in Milan in Italy.
Certainly having an environment with constant temperature and humidity can help at least eliminate them as a hypothesis.
In any case, everything is normal up to the first washings. Then, when I put the print in the toner, loses density and becomes warm. It does recover a bit in the fixing, but at the end it almost looks like a no-toned print. I doubt that the gold trichloride has spoiled cause high temperature. The last one I toned with thiocyanate to try to cool it more, but it was still warm.

 

[nmp]

Yes, winter is cold here, I live in Milan in Italy.
Certainly having an environment with constant temperature and humidity can help at least eliminate them as a hypothesis.
In any case, everything is normal up to the first washings. Then, when I put the print in the toner, loses density and becomes warm. It does recover a bit in the fixing, but at the end it almost looks like a no-toned print. I doubt that the gold trichloride has spoiled cause high temperature. The last one I toned with thiocyanate to try to cool it more, but it was still warm.

If something specific is going on with the toner, I wouldn't know too much about it - have yet to try gold toning. If you can make a fresh one and study the two side by side, it will allow you to eliminate the possibility of toner going bad, regardless of environmental conditions.

(On a second thought, my toner temperature theory wouldn't work here anyway since in that scenario warmer temperature would point to cooler tone - which is opposite to what you are observing.)

:Niranjan.

 

[stefano_ber]

If something specific is going on with the toner, I wouldn't know too much about it - have yet to try gold toning. If you can make a fresh one and study the two side by side, it will allow you to eliminate the possibility of toner going bad, regardless of environmental conditions.

(On a second thought, my toner temperature theory wouldn't work here anyway since in that scenario warmer temperature would point to cooler tone - which is opposite to what you are observing.)

:Niranjan.

next print I will try a new batch of gold that I have kept cool and we will try to eliminate this doubt! ;-)

 

[nmp]

next print I will try a new batch of gold that I have kept cool and we will try to eliminate this doubt! ;-)

Your normal one is gold-borax or gold-thiourea?

 

[stefano_ber]

Your normal one is gold-borax or gold-thiourea?

both borax and thiocyanate, similar effect