How to develop B&W film (HP4 100) with No Thermometer

[darkroommike]

You must live in a different world than I do.

I can't imagine what a thermometer that only reads 35°C and higher is for ... maybe you bought oven thermometers, but I'd think that would be clearly labeled...

If they start at 35°F, there's no problem.

I'd look harder for my thermometer.

But, if you have a good idea of the ambient temp of your processing area and can let the liquids stabilize at that temp, then you can simply adjust processing times as per the Ilford time/temp chart here: https://www.ilfordphoto.com/wp/wp-content/uploads/2017/03/Temperature-compensation-chart.pdf

I'd buy a new refrigerator too

Doremus

That would be a medical thermometer, body temperatures under 35C are bad, hypothermia at best, three days dead at worst.

 

[darkroommike]

If your abmbient temperature is a lot higher that 24C look to a tropical developer, what folks did in the old days before water chillers.

 

[AgX]

Of course. I wasn't thinking about thermometers for taking human temperatures. These, of course, are not really suitable for monitoring room or chemical temperatures.

They are the cheapest ones for C-41 and even more precise than some more expensive ones, though as being maximum thermometers one has to adapt ones metering routine.