Develop bw film in room temperature

[newtorf]

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even during the hotest days (~30-35 C), tap water here (san jose) hardly exceeds 24C. so check the temperature of your water.

 

 

Anybody has formula to define how long develop time in room temperature? Room temperature is about 30 degree celcius here.

 

Couldn't find it at massive dev chart.

 

In particular, I will develop 35mm kodak tx-400 at boxspeed ISO in D76 1+1 dilution

 

Ready to use recipe will be much appreciated

 

Thank you.

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[tobey bilek]

My experience is 20 deg is optimum for quality. I have used summer room temp and I can get the same contrast with time compensation, but grain structure goes larger. It will be terrible by the time you get to 30. Plus who knows what other damage.

 

 

Ilford has a time/temp compensation chart inside the PDF for each film. I have an older book, and it is a universal compensation chart.

 

If you PM me with 20 deg time, I will send you times for 26/28/30/32 etc

[iphoenix]

Just a thought (maybe a little out of left field): How about dropping the temperature of all the chemicals and water in a "Coolgardie Safe". The principles of this can be looked up on the internet, but it has been used for many years (back to the 1800's) in Australia to keep meat, butter, cool water, etc. and even has been known to cool the occasional bottle of wine in the hot weather. In the 1960's I used this principle (a piece of damp cloth over a fan) to help cool a very hot office. If you have no fan, drape a piece of wet sacking over a frame, containing the things to be cooled. No guarantees, but it should lower the temperature by at least a few degrees.