Feb 25, 2014 · The very top of this particular thermometer had a small bulge inside, so as the alcohol reached the top it spread out and the split bubbled itself away. This will only work if the thermometer's maximum temperature is below the boiling point of water. Be careful not to overheat it, or you. Disclaimer: This worked for me. Once.

Jun 19, 2015 · I use my Kodak Process Type 3 mercury thermometer as my darkroom standard. I calibrate my Kodak Deluxe alcohol thermometer against the Type 3. That calibration shows that the Deluxe reads exactly 0.5F too high at 68F. However, I don't have a calibration constant for the Type 3 itself. I simply define it to be correct for my purposes.

Dec 4, 2023 · Actually, it used to happen with mercury thermometers, too, but these were even easier to 'fix' by just forcefully whipping the thermometer a couple of times so that centrifugal forces push the liquid back towards the end. This works with alcohol thermometers as well, but a little less so than with the old mercury ones.

Feb 25, 2014 · It was a $4 thermometer, but still. Interesting that it is alcohol in there, not mercury. In school science class we used to play w/ a blob of mercury, letting it roll around in out hands. I'm still alive. Like Roger said, I only use my dial thermometer for mixing up D76 at around 130 degrees, where I have a 10 degree flexibility.

Dec 24, 2023 · Aside from the delicate coating, mirror tension plays a role, the lens needs to be opened, which may already affect the conditions inside, and whether isopropyl alcohol on microfiber is the right cleaning medium - I don't know. What do the experts think about this? The current situation in comparison I have versions II (left) and III of the 500 ...

Nov 8, 2015 · 1.) The temp should be fairly consistent, but there will always be hot spots. I check with a laser thermometer, which isn't perfectly accurate, but does give you an idea of what is happening heat wise. One of the reasons I use an acid free board "sandwich" to flatten/mount with is that I think it disperses the heat a bit more evenly. 2.)

Jan 14, 2024 · I got a like-new Nikon SB-28 Speedlght from ebay. As is the case many times, the item has hidden faults. In this case, the mechanism to activate the 20mm and 18mm settings was faulty.

Mar 16, 2013 · The thermometer is made from rust-free stainless steel and is maintenance-free. If you drop it, the indicator will jump around like crazy, but it won't break like it's glass cousins. The included stainless steel clip helps make sure that the thermometer sits securely on the tray lip and that the scale is level.

Jan 7, 2024 · The lens elements of the viewfinder (four maybe) were all glued in place. Mine was a little cloudy and I took an alcohol soaked piece of paper and fed it between the elements to see if the fog would easily be cleared and there was no effect. That suggested permanent damage so I just cleaned the two outer surfaces and was happy.

Jan 4, 2020 · Pure Silver Chloride emulsions can be made with an ISO of about 25 - Outdoors and with no UV filter. It has very high UV sensitivity and can come through very well for you.