Temp measurement and accuracy

[Bruce Douglas]

For boiling point, what you really need to know is what the barometric pressure is. Pressure affects the boiling point. Barometric pressure not only varies with altitude but also with the weather.

I checked the accuracy of the old Premier dial thermometer I use with two electronic thermometers and decided it was reading two degrees F high. I develop my film in Xtol at 68 degrees F. When I want solutions at 68 deg F I adjust their temperature so my dial thermometer indicates 70 deg. F.

The most important thing the thermometer does for you is to ensure that you are developing film under consistent conditions to yield consistent results.

[Heroique]

I think we need a good scientist around here to distinguish between “boiling point” and “normal boiling point.”

Otherwise, this thread’s going to get bloody, brutal and ugly – and finally locked.

[Leigh]

... to distinguish between “boiling point” and “normal boiling point.”

You actually expect anybody on this board to understand the meaning of "normal"?

You certainly are an optimist.

- Leigh

[ic-racer]

I think we need a good scientist around here to distinguish between “boiling point” and “normal boiling point.”

Otherwise, this thread’s going to get bloody, brutal and ugly – and finally locked.

Yes, at 101.325 kPa which you are measuring with your barometer.