To inaugurate its new premises and production site, TCN opened its doors on September 20, 2022. Thank you all, our customers and partners who came in great numbers to discover our new premises, equipment, and the full range of our services. During coloring workshops, you improvised as chemists and that in joy and good mood:…

Polycarbonate is a plastic used in the fabrication of various items, such as screens, and glasses for sports or safety. PCL4 liquid dyes are suitable for the coloration of non-coated polycarbonate lenses, by dipping. They are easy to use, the process is fast and allows to obtain even colors. Follow the steps below to dye…

The carrier HDX allows to reduce up to 4 times the coloration time of your high-index lenses. High-index organic lenses (1.60 – 1.67) are thick lenses. Therefore, the coloration process is slower than with standard lenses. Discover how to accelerate the coloration of your high-index organic lenses, with our carrier HDX, used as a pretreatment….

TCN visited the premises of the eyewear company Novacel, one of its loyal customers based in Château-Thierry. The purpose was to discover their organic lens tinting semi-industrial process, using TCN’s CRX powders. CRX dyeing powders are suitable to tint CR-39® organic lenses. They can be used in small or large productions. Watch our demo video…

Whether it is for aesthetics or to make solar lenses, a lot of glasses lenses are tinted. CRX powders are specific coloring powders useful to color coated and CR-39® organic lenses. Our CRX powders include 26 standard colors that can be mixed with each other. They are available in plastic boxes of 500 g and…



Novacel is a French company located in Château-Thierry, in the Hauts-de-France region. It was created in 1994 and it employs more than 600 people today. It is in third position on the ophthalmic lenses market in France.

The company increases its turnover by 20% every year. Even during the Covid crisis, the turnover increased thanks to the delivery of lenses straight to the opticians’.

TCN had a meeting with Lotfi Mouine, Tint Laboratory Manager, in order to get his feedback regarding his collaboration with TCN. Lotfi Mouine’s job became his passion: he has been working in the coloration field for 18 years.


Novacel tints 6000 lenses a day and creates different collections every year.

According to Lotfi Mouine, “Novacel needs to test, innovate, find new solutions and new ideas. TCN meets these needs by constantly improving the quality of its processes and always offering more choices thanks to its expertise in R&D”.

In addition, the Brexit made the purchase of organic lenses coloration products harder for Novacel. In these circumstances, Lotfi Mouine wanted to reinforce his relation with his long-time supplier TCN.


Lotfi Mouine says: TCN products give me complete satisfaction because they are soluble and allow a consistent result.

Unlike other products on the market, they do not form a slick on the surface of the solution. Moreover, the tanks are easily cleaned after use, because TCN’s CRX range is in powder form. So, my team at Novacel’s laboratory wastes less time than with other suppliers for the equipment maintenance. Then, it is more productive with TCN products.

Another competitive advantage is that TCN products present a better solution for the environment because CRX coloring powders do not contain any CMR substance.

For all of these reasons, TCN is as for me one of the best suppliers of organic lenses coloration products in Europe. Besides, TCN powders are more economical than ophthalmic lenses liquid dyes. 1kg of powder is more profitable than 1L of liquid dye. Indeed, powders can be used for as long as liquids, and since powders are concentrated, they allow to make more baths. In addition, CRX powders are delivered in recyclable metallic pails.”


Lotfi Mouine explains: “The proximity with the supplier is an important factor. I trust TCN and salute their availability, their engagement and their development. This relation is beneficial for both our companies. We can only move forward thanks to the expertise of our firms that progress together. Moreover, culture and language make this teamwork easier.”

TCN products allowNovacel to offer medical filters or therapeutic lenses for optical failures such as retinitis pigmentosa or AMD. 

So, Novacel is proud to create new solutions to bring an additional comfort or a help in the daily life of the spectacle wearers. 

Novacel’s values, which are complicity, innovation and authenticity are values shared with TCN. It’s working all together that moves us forward.



“Today, sunglasses have become a real fashion accessory.  They exist in all the colors, we can see that a lot on social media. They are constantly evolving.”

Lotfi Mouine wants to share his point of view regarding the impact of current events on the way we work: “After the Covid crisis and the war in Ukraine, we have to learn from our mistakes to be able to reach out. We need to be strong, united and change codes.

These are exactly the purposes of the alliance between Novacel and TCN.”

If you have the intention of creating your own color, you will have to choose criteria adapted to the realization of the desired shade after defining the color that you need (see part 3), starting from selecting primary colors that will be used to produce it. 4.1. Choice of primary colors In practice, TCN can…

TCN at the Mido Eyewear Show in Milan from April 30th to May 2nd 2022! This essential event of the eyewear industry allowed our team to exchange views with our customers and prospects on the polishing and coloration of their spectacle frames and/or organic lenses. We wanted to thank our loyal customers, who told us…

In order to define a color, it is necessary to determine it according to a reference frame as the Pantone color chart for instance, and measure the result. You often need specific shades that are not part of TCN’s standard shades of coloration ranges: CRX, GTC, GTD, TACC, PCL4… This device allows you to check…

Colors can be classified in 3 categories according to their composition: primary, secondary and tertiary colors. The primary colors group serves to create all of the other colors, through combinations made between the different categories. This combination principle allows TCN to make numerous coloring products adapted to specific plastics. Here is this principle in detail:…

Illustration & Design by Helena Pallarés
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