Articles - JiNan Vican

Mechanism of photochromism

It was mentioned earlier that there are two independent chromophores in fulgide molecules. Kurita et al. studied the excited state characteristics of phenyl-substituted fulgide, and found that when fulgide molecules were excited by ultraviolet light, only excited singlets were generated, and some fluorescence of fulgide could be observed at low temperature. The existence of (n, r ") excited singlet was further confirmed in nanosecond laser flash photolysis experiment, and no evidence of excited triplet was observed, and oxygen had...

Friday April 3rd, 2026Technical SupportRead more...

Several ways of molecular excitation

(1) Thermal excitation to excite electrons in normal state molecules requires a large amount of energy, which can only be achieved in flames and high-temperature furnaces. The energy required to excite molecular vibrations is much smaller, but only a certain proportion of molecular vibrations in heated gases are excited. In normal temperature gases, molecules are in rotation, and the energy required to excite molecular rotation is even smaller. The characteristic of thermal excitation is that the number of molecules...

Thursday February 26th, 2026Other Articles, Technical SupportRead more...

Application of luminescent powder in printing paste

The preparation and application methods of luminous printing paste described in this paper are for reference only, and corresponding adjustments should be made in practical application. Select medium-sized or alkaline transparent printing paste and D-type or S-type luminescent pigment with the weight ratio of 20-50%, and mix them evenly. Adjust the viscosity with the corresponding diluent. Before printing luminescent printing paste, you should first lay a layer of white background. The following transparent printing pastes are available for selection. Nylon printing paste Advanced...

Tuesday January 27th, 2026Other ArticlesRead more...

The development of blue long-lasting phosphorescent materials for fibers

The main raw material for preparing blue light night glow fibers is the rare earth long-lasting phosphorescent material that can emit blue light. The research fields of blue light long-lasting phosphorescent materials include the metal sulfide system, the aluminum oxide system, and the silicate system. In 1866, French chemist Theodore Sidot prepared ZnS-based sulfide phosphorescent materials, which belong to the first generation of long-lasting phosphorescent materials. Since the 1920s, people have begun to develop blue light sulfide system long-lasting...

Sunday January 4th, 2026Other ArticlesRead more...

What issues should be noted when applying plastic luminous agents?

Plastic luminous agents can be used for both thermoplastic and thermosetting plastics. However, to fully leverage their effectiveness, they are more effective in manufacturing light-colored or transparent luminous plastic products. The luminous plastics produced from the widely used rare earth aluminate-based plastic luminous agents at present have relatively good comprehensive performance. In order to produce luminous plastics that satisfy customers, the following issues should be noted during the use of plastic luminous agents. ① The uniformity of dispersion of plastic...

Friday November 28th, 2025Other ArticlesRead more...

Concept and characteristics of luminous fiber

Luminous fiber, also known as rare earth luminescent fiber, refers to rare earth luminescent materials as light source. High-tech fiber with automatic light absorption-light storage-light emission performance at night made by special spinning process. The fiber has excellent performance of emitting light at night. As long as it absorbs any visible light for 10min, it can be excited to store the absorbed light energy in the fiber, and it can continue to emit light for more than 10 hours in...

Monday October 13th, 2025Other ArticlesRead more...

Characteristics of plastic luminous agent

The remarkable characteristics of metal sulfide system are rich luminescent colors, which can cover the luminescent region from blue to red; The disadvantage is that Unstable chemical properties, low luminous intensity and short time. The characteristics of rare earth aluminate luminous agents are as follows ① High luminous efficiency. Aluminate luminous agents have high quantum efficiency in visible light region, and are used in plastics. The amount is small, which is beneficial to reducing the manufacturing cost of luminous plastics. ② Long luminous time....

Tuesday September 9th, 2025Technical SupportRead more...

Manufacture of polymer cement long afterglow luminescent coating

(1) adding polyacrylate emulsion with core-shell structure, emulsifier, defoamer, film former, thickener and dispersant in sequence, mixing, filtering, weighing and packaging to obtain liquid material. (2) mixing luminescent powder, white cement and filler, weighing and packaging to obtain powder. (3) At the site where luminous paint needs to be painted, the liquid material and powder are mixed evenly according to a certain proportion, and then can be painted for use. [Characteristics] As the basic branch of cryology, core-shell polyacrylate emulsion has reduced...

Tuesday August 5th, 2025Technical SupportRead more...