Specific Wavelength Absorption Dyes
Specific Wavelength Absorption Dyes are dyes that only absorb wavelengths across a specific range across
the wide spectrum from ultraviolet to near-infrared.
These includes dyes that absorb near-infrared light that is not visible to the naked eye,
and dyes that only absorb specific colors.
These are widely used in lenses for glasses and to give functions to displays.
Yamamoto Chemicals maintains an extensive lineup of Specific Wavelength Absorption Dyes able
to sharply cut a wide range of specific wavelengths from ultraviolet region to near-infrared region.
UV to near-ultraviolet (up to 420 nm)
These dyes can be used to prevent degradation caused by light from the ultraviolet (UV) to near-ultraviolet (up to 420 nm) range, improve durability, and to cut high-energy visible (HEV) light for optical materials.
Our lineup includes conventional benzotriazole-based dyes as well as non-benzotriazole UV-absorbing dyes.
Visible light (in the 400-700 nm range)
The colors that reach the eyes can be controlled by absorbing specific wavelengths of visible light in the 400-700 nm range.
In addition, by sharply cutting specific wavelengths of visible light, products can be given functionality such as the ability to enhance color purity.
One example of this application is to cut the entire visible light region while not cutting the near-infrared region.
In this case the exterior of a material appears black but functions in a way that allows infrared rays to pass through.
Near-infrared (IR) light (from 700 nm)
The absorption of near-infrared light is utilized for various functions such as heat shielding and converting laser light into heat, and those wavelength characteristics are then used for a wide variety of applications such as sensors, security ink and traceability.
Specific wavelength cutting dyes for ultraviolet (UV) to near-UV (up to 420nm)
These dyes can not only cut light in the UV region but also in the visible light region near 400nm.
We possess highly durable non-benzotriazole UV absorbers
In recent years, some benzotriazole UV absorbers have been designated as candidate substances for regulation as persistent organic pollutants (POPs).
In response, we have worked to develop non-benzotriazole dyes as a substitute.
We have also worked on the development of benzotriazole-based dyes, and possess dyes that are able to cut the long-wavelength region (visible light region) more than existing benzotriazole-based UV absorbers.
Specific wavelength cutting dyes for visible light (400-700nm)
Dyes that cut the visible light region are used in products such as displays and high-performance sunglasses.
Eagle View® (absorbs only specific wavelengths)
Eagle View® (absorbs only specific wavelengths)
This is an example of these dyes being used to impart functions to sunglasses.
Visible light cutting dyes can be used to impart functions to products such as sunglasses.
Cutting specific wavelengths in the visible light region improves contrast and visibility.
Specific wavelength cutting dyes for near-infrared (IR) [700nm ~]
Near-infrared resonance photosensitive dyes use their wavelength characteristics across a wide range of fields including sensors, security inks and traceability.
One example of this application is to cut the entire visible light region while not cutting the near-infrared region.
In this case the exterior of a material appears black but functions in a way that allows infrared rays to pass through.
Soluble black IR-transmitting dye in PP
Example of a PP resin that shields the visible light range and appears black, but can transmit light in the IR range.Courtesy Prime Polymer Co., Ltd.
This is an example of a near-infrared resonance photosensitive dye being used for wavelength control.
IR absorbent fiber: Patterns are difficult to see with the naked eye but can be viewed through an IR camera
This is an application of a functional fiber with a near-infrared resonance photosensitive dye weaved in. (Courtesy Tokyo Kasei University)
QR codes, logos and other elements can be added without compromising the design of the fabric.
This is an example of the application of a functional fiber that can be used for authenticity checks and other purposes by weaving a near-infrared resonance photosensitive dye into a resin yarn.
QR codes and various patterns can be embroidered using IR absorbent fibers with regular fibers embroidered over them. As a result, the pattern cannot be seen from the outside, and can only be checked through an IR camera.
Contact Us
For consultations or queries regarding
Yamamoto Chemicals and its products,
feel free to contact us via telephone
or the email inquiry form.
Telephone queries: [Tokyo Office]
+81-3-6402-2191Weekdays 9:00 a.m. to 5:00 p.m.,
closed Saturdays, Sundays and public holidays