Amor Vincit Omnia wrote: ↑Tue Sep 06, 2022 8:07 am

Stever232 wrote: ↑Tue Sep 06, 2022 3:24 am Just upsize it to the bigger normal size please

I think they have recognised that “normal” is not set in stone, and depends very much upon the individual. Which is why they have the same watches in different sizes. You would like it in 42 mm, I assume?

Anyway, welcome to the forum. Do please visit the Member Introduction section and tell us about yourself.

You are absolutely correct, I meant normal size for myself! I need that bigger dial to see without fiddling so much underwater. It’s just so effortless to glance at a non cluttered pure larger dial. The lume on mine is starting to not last very long though so it’s getting interesting in the dark water occasionally, although I do use my computer as well. Thank you for the response and I hope that I didn’t offend anyone!

Stever232 wrote: ↑Tue Sep 06, 2022 6:18 pm Thank you for the response and I hope that I didn’t offend anyone!

Thanks also for your response, and I’m certain no one will be offended. You explain your own needs very well. Smaller watches are becoming normalised across the market right now, for which some of us are very grateful. I hope they produce the watch you want in the size you want at some point.

Stever232 wrote: ↑Tue Sep 06, 2022 6:18 pm The lume on mine is starting to not last very long though so it’s getting interesting in the dark water occasionally, although I do use my computer as well.

This is interesting. I was under the impression SuperLuminova wouldn't degrade for decades. I have had some in-depth articles on how lume works in my Instapaper waiting for some time to study them. Looks like the time might be now!

So I finally started reviewing the lume articles I referred to earlier. Basically, SuperLuminova is an ion impregnated ceramic powder. It works by using UV light to charge electrons (by absorbing the photons) to move from one shell to another gaining energy. If the source is held constant the electrons will continue in the excited state indefinitely. When you remove the UV source the electrons shed energy and move back down the shells and emit a photon.

There are about 8 base emitter colors (depends on what ion they add). The lume colors can be pretty much anything. The trick here is that most of the pigment that is added is UV absorbent. It not only grabs incoming photons before it can reach the electrons it can actually grab the emitted photons before it hits your eye. The more pigment that is added the less light that is emitted and visible. The worst offenders in the charts I saw were red and white. They actually stated that white takes a large amount of pigment. It still out performs red though. Black wasn't even on the chart so it must be really low as well.

There is also a process using bonding agents etc to get the powder into a usable paint. Speaking of paint, there is also a limit as to how thick the application can be and still be useful. I think they said somewhere around 0.8mm or so. It gets too thick for the UV light to reach the electrons.

So, there is no radioactive decay like there was for tritium. Theoretically it should last for decades and glow just as bright. I would think this might be for pure C1 only. There may be some pigments and bonding agents that decay over time acting as shields to UV reaching the electrons. I don't know. Even then I find it strange that the Stever232 is seeing shorter lume performance. As long as the lume is 'fully charged' with a good source it should glow for the same duration for years. The intensity of the UV source matters. For instance fluorescent lighting will only charge it to about 1/3 of direct cloudless sunlight. It should last until the paint degrades and falls off the dial.

This is a pretty good article.