Again intriguing matter here at You Asked Us. One of our ordinary perusers, Jordy, sent us an inquiry concerning the conceivable staining of Luminova and Super-LumiNova.

You Asked Us: Will Super-LumiNova, much the same as Tritium, Discolor When It Ages?

Here’s the full content of the question:

From: Jordy

Message Body:

Hi guys!

This is an inquiry that’s been keeping me occupied for a long while now. I’m generally new to watch gathering and began my habit when all new watches were delivered with Luminova and Superluminova.

We all realize that the more seasoned sorts of lume stain when it ages. Is this the equivalent with Luminova and for what reason did they present Superluminova? What kinds of lume are there? Would we be able to anticipate a slight move of shading in the Luminova throughout the long term? My most seasoned watch is a Mark XV from 2002 and likely has Luminova however can’t very see any staining, or they may have traded the dial during one of the IWC administrations. I’m anticipating your criticism on this subject!

Best respects, Jordy

A few questions

So truth be told, there are many inquiries in Jordy’s email. Will Luminova and Super-LumiNova stain after some time? For what reason was Superluminova acquainted as a replacement with Luminova? What sorts of Lume are there?

A completely Super-Luminova stacked Sinn 656.L dial

Which kinds of glowing materials are utilized in watchmaking?

To answer Jordy’s question ‘What kinds of lume are there?’ I might want to point toward one of our companions, Hodinkee. Jack Foster, in July 2018, did a benchmark article on glowing materials utilized in watches. He not just clarifies which kinds of glowing materials were and are utilized in watchmaking, nonetheless, also how and why they are brilliant. There’s no chance I would have the option to add anything to that; Jack’s article is an unquestionable requirement perused when keen on this matter:

In short, there’s Radium, a touch of Promethium (which Seiko utilized for a brief timeframe), Tritium, Luminova, Super-LumiNova, and presumably a couple of brand-possessed others like Rolex’ Chromalight and Seiko’s LumiBrite. You’ll rapidly discover that Radium and Promethium are both radioactive synthetic components. Individually with symbol Ra and nuclear number 88, and image Pm and nuclear number 61. Furthermore, Tritium is a radioactive isotope of hydrogen (3H). So every one of them share practically speaking to be radioactive, something not extremely well known in the utilization of shopper merchandise, and consequently the quest for an answer now was still on.

Highly absorptive and light producing photoluminescent powder

The next two steps

In 1993 a following stage came from a Japanese company named . They introduced, and protected, a glowing material, which was named Luminova. Luminova doesn’t utilize a radioactive material to sparkle. All things being equal, it uses a material known as strontium aluminate (SrAl2O4), combined with the non-poisonous and non-radioactive compound component Europium. What’s more, to be pretty much as complete as could be expected, Europium is a non-poisonous, non-radioactive substance component with image Eu and nuclear number 63.

There are two significant contrasts among Luminova and the previously mentioned light-producing materials, Radium, Promethium, and Tritium. In the first place, the most significant and as referenced, Luminova isn’t radioactive. Yet, also, very considerable too, is that Luminova doesn’t sparkle self-sufficiently. It’s a so-called photoluminescent material, it should be presented to a light source first before it’s ready to glow.

Good meaningfulness of the Pinion Iron Heart

A piece of confusion

There’s a touch of disarray about the distinction among Luminova and Super-LumiNova. What is known without a doubt is that in 1998 a Swiss company in joint-adventure with Nemoto, began the company Luminova AG to supply the Swiss watch industry with glowing material. All significant Swiss watch brands utilize this brilliant material for their dials and hands meanwhile.

From 2000 onwards, at any rate on the lookout, the name of the radiant material changes to Super-LumiNovaSome say that Super-LumiNova is an upgraded rendition of the first Luminova, which was intended for modern use. Truth is that the radiant material, provided by Luminova AG/Tritec for the utilization in the watch business, consistently has been diverse to the standard mechanical Luminova from Nemoto. So much is evident that the these days named Swiss Super-LumiNova is at any rate far more expensive than the modern Luminova, as still delivered by Nemoto (in Japan and Portugal).

Interesting to see that on the brand name LumiNova is as yet utilized. While at Swiss Super-LumiNova is referenced as the brand name for the radiant item for use in the Swiss watch business. It may very well be that the expansion ‘Swiss’ makes the material more costly, as is some of the time the case with different items conveying the ‘Swiss’ name. In any case, that isn’t the case here. The Swiss Super-Luminova is totally hand made and controlled in Switzerland and has a lot better quality towards shading and light emittance than its Japanese modern counterpart.

Light transmitting Strontium Aluminate powder

ISO normalization of photoluminescent stores applied to time-estimating instruments

Swiss Super-LumiNova can be found in three unique evaluations these days. Standard Grade, Grade A, and Grade X1. Evaluation X1 is said to have a presentation increment of up to 60% following two hours compared to the Standard Grade. RC Tritec educated us that the clarity as per the ISO 3157 norm of Swiss Super-LumiNova Grade X1 will be stretched out by in any event a factor of 1.6 on the long haul. Tritec alludes to ISO 3157:1991 which is presently removed. The current ISO normalization which indicates the test strategies for the photoluminescent stores applied to time-estimating instruments is ISO 17514:2004. For those of you intrigued, it very well may be found at CHF 38.= Swiss Francs. While the enactment conditions are the equivalent for the 3157 and 17514 ISO guidelines, in the last there isn’t actually a perceivability limit characterized. Accordingly Tritec lean towards to keep the ISO 3157 in the rear of their mind.

The blue light emanating Omega Seamaster 300 Spectre

Further developments

So in the variety of Jordy’s questions, we’ve showed up at Swiss Super-LumiNova. That was the year 2000, in the mean time, there have been further advancements in radiant materials. While from the outset Luminova and Super-LumiNova sparkled primarily greenish, different tones were created also. Rolex, for example, changed in 2008 from Super-LumiNova to its own restrictive compound, Chromalight. Chromalight sparkles blue instead of green, and Rolex states that the gleaming keeps going longer and it’s simpler for natural eyes to peruse in faint lighting. Seiko has its own restrictive brilliant compound too, which was named LumiBrite.

RC Tritec is consistently adding new discharge tones to its range. May a year ago for example, yellow, orange, pink, and ultramarine have been added to the generally accessible green, blue, violet, and white.

Not just the shade of the radiated light of Super-LumiNova created over the long run, also the external shade of the brilliant material when appeared in sunshine. While Super-LumiNova, to start with, looked basically white, numerous makers changed the shade of the iridescent material to more yellowish or even creme and earthy colored. Also, not without a reason.

Earlier Rolex with green radiating Super-Luminova and a later model utilizing Rolex own Chromalight [picture found at]

Will Super-LumiNova stain when it ages?

With the maturing of Radium and Tritium, the shade of these materials changes. Other than a corruption in usefulness, this makes a patina on the radiant markers and hands of a watch. It currently simply happens that this patina is adored by numerous vintage watch authorities. Somewhat of a weird circumstance, when individuals love it that something falls apart, isn’t it?

Anyhow, with this deterioration, there’s a difference in shade of the record markers and hands. What’s more, that’s what recognizes a vintage watch from another one. That too, it means that a vintage watch may in any case have the first dial and hands. Albeit the last isn’t entirely dependable by any means, which again can be learned in Jack’s article on Hodinkee.

The Omega Speedmaster Speedy Tuesday II ‘Ultraman’ utilizing a fake patina hued light producing material.

Does it or doesn’t it?

And here we’re getting to the exposure of our journey. Luminova and (Swiss) Super-LumiNova are not inclined to staining or maturing over time. They don’t blur, nor will cooperate with dampness. White can’t avoid being white forever.

With the current hunger for vintage looking watches, this isn’t explicitly a favorable position. Obviously, the advantage is for not being radioactive and for life span. In any case, unadulterated white record markers and hands don’t look like a lot to vintage watches. That’s, among other tasteful reasons, why many watch brands were searching for various shades of Super-LumiNova. Quite possibly the most applied tones is somewhat grayish, to even earthy, or the supposed false patina. You like it or not…



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