Before working with this product, you must read and become familiar with the available information regarding its risks, proper use, and safe handling. This information is provided in various formats, including the current Safety Data Sheet (SDS) and product label. SDS can be accessed via the following link:
Safety Data Sheets (SDS) for Covestro products | Covestro
For further questions, please use the contact information provided on this technical data sheet.
Product description
Bayfol® HX200 is a light-sensitive, self-developing photopolymer film. It comprises a three-layer stack: A cellulose triacetate film (TAC) substrate, a light-sensitive photopolymer layer, and a polyethylene film (PE) protective cover. The PE cover can be removed from the photopolymer layer.
Applications
Bayfol® HX200 is used for producing phase holograms, specifically volume reflection holograms and volume transmission holograms. The product is applicable to various types of volume holograms. Its self-developing property and the ability to record across a range of visible light wavelengths make it suitable for different holographic applications in both research and industrial settings.
Layer Stack Schematic:
Typical Values
General Properties |
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|---|---|---|---|---|
| Property | Test Condition | Value | Unit | Standard |
| Typical substrate thickness | 60 | microns | acc. to ISO 4593, 23°C | |
| Typical photopolymer thickness | 16 | microns | white light interferometer | |
| Typical cover layer thickness | 40 | microns | acc. to ISO 4593, 23°C | |
Optical Properties |
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| Property | Test Condition | Value | Unit | Standard |
| Light transmittance | Unrecorded film, w/o cover foil, see spectrum in appendix | % | ASTM E 01348 | |
| Haze | after UV flood cure 2) | < 2 | % | ASTM D 1003 |
| Index of refraction nD of the substrate | 1,485 | Prism coupler | ||
| Index of refraction nD of the photopolymer | unrecorded | 1,500 | Prism coupler | |
| Index of refraction nD of the photopolymer | after UV flood cure 2) | 1,505 | Prism coupler | |
Holographic Performance Data: Denisyuk Holograms |
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| Property | Test Condition | Value | Unit | Standard |
| Spectral diffraction efficiency η | > 95 | % | ISO 17901-1, by transmittance of zero-order transmitted wave | |
| Spectral bandwidth | (full width at half maximum) | > 15 | nm | ISO 17901-1, by transmittance of zero-order transmitted wave |
| Recording dosage | (needed to achieve above mentioned values) | approx. 30 | mJ/cm² | Recording wavelenght: λ = 532 nm; Power density: PR= 4.6 mW/cm² |
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Holographic Performance Data: Reflection Holograms in 2-Beam Geometry |
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| Property | Test Condition | Value | Unit | Standard |
| Maximum refractive index modulation ∆n1 at λ = 633 nm | Applied total dosage approx. 15 mJ/cm² | > 0,03 | ISO 17901-2 | |
| Maximum refractive index modulation ∆n1 at λ = 532 nm | Applied total dosage approx. 20 mJ/cm² | > 0,03 | ISO 17901-2 | |
| Maximum refractive index modulation ∆n1 at λ = 457 nm | Applied total dosage approx. 25 mJ/cm² | > 0,03 | ISO 17901-2 | |
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Shrinkage and Spectral Shift |
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| Property | Test Condition | Value | Unit | Standard |
| Effective thickness shrinkage | after recording and UV flood cure 2) | approx. 1,4 | % | Reflection holograms |
| Spectral shift in Denisyuk Holograms | after recording and UV flood cure 2) | approx. -8 | nm | Wavelength deviation between recording / reconstruction |
| XXXXX SOME OBSOLETE ENTRYS | XXXXX SOME OBSOLETE ENTRYS | XXXXX SOME OBSOLETE ENTRYS | ||
| λ = 633 nm | > 0,03 | |||
| λ = 532 nm | > 0,03 | |||
| λ = 457 nm | > 0,03 | |||
| λ = 633 nm | Applied total dosage | approx. 15 | mJ/cm² | |
| λ = 532 nm | Applied total dosage | approx. 20 | mJ/cm² | |
| λ = 457 nm | Applied total dosage | approx. 25 | mJ/cm² | |
| Typical recording dosage needed to achieve above ∆n1 values | ||||
| Maximum refractive index modulation ∆n1 per recording wavelengt λ | ISO 17901-2 | |||
| Optical Properties | ||||
|---|---|---|---|---|
| Property | Test Condition | Value | Unit | Standard |
| Light transmittance | Unrecorded film, w/o cover foil, see spectrum in appendix | % | ASTM E 01348 | |
| Haze | after UV flood cure 2) | < 2 | % | ASTM D 1003 |
| Index of refraction nD of the substrate | 1,485 | Prism coupler | ||
| Index of refraction nD of the photopolymer | unrecorded | 1,500 | Prism coupler | |
| Index of refraction nD of the photopolymer | after UV flood cure 2) | 1,505 | Prism coupler |
| Holographic Performance Data: Denisyuk Holograms | ||||
|---|---|---|---|---|
| Property | Test Condition | Value | Unit | Standard |
| Spectral diffraction efficiency η | > 95 | % | ISO 17901-1, by transmittance of zero-order transmitted wave | |
| Spectral bandwidth | (full width at half maximum) | > 15 | nm | ISO 17901-1, by transmittance of zero-order transmitted wave |
| Recording dosage | (needed to achieve above mentioned values) | approx. 30 | mJ/cm² | Recording wavelenght: λ = 532 nm; Power density: PR= 4.6 mW/cm² |
Holographic Performance Data: Reflection Holograms in 2-Beam Geometry
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|---|---|---|---|---|
| Property | Test Condition | Value | Unit | Standard |
| Maximum refractive index modulation ∆n1 at λ = 633 nm | Applied total dosage approx. 15 mJ/cm² | > 0,03 | ISO 17901-2 | |
| Maximum refractive index modulation ∆n1 at λ = 532 nm | Applied total dosage approx. 20 mJ/cm² | > 0,03 | ISO 17901-2 | |
| Maximum refractive index modulation ∆n1 at λ = 457 nm | Applied total dosage approx. 25 mJ/cm² | > 0,03 | ISO 17901-2 |
| Shrinkage and Spectral Shift |
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|
|---|---|---|---|---|
| Property | Test Condition | Value | Unit | Standard |
| Effective thickness shrinkage | after recording and UV flood cure 2) | approx. 1,4 | % | Reflection holograms |
| Spectral shift in Denisyuk Holograms | after recording and UV flood cure 2) | approx. -8 | nm | Wavelength deviation between recording / reconstruction |
Storage
The unrecorded photopolymer film should be stored in the original and sealed Covestro container that is used for delivery, whenever possible.The storage temperature shall be kept at ≥15°C and ≤ 25 °C.While the recorded film is quite stable, the unrecorded photopolymer film should be protected from light, humidity, heat and foreign materials.
Storage time
Six months Storage Time is recommended.
Processing
General information about handling instructions under dark room conditions
The product is light sensitive. Exposure to light prior to the holographic exposure might sacrifice the refractive index modulation Δn1 and diffraction efficiency η. Examples for tolerable expositions in dark room environment (dim yellow light) without sacrificing holographic performance are given in table below. Test condition: Photopolymer film laminated on glass and illuminated with illuminant positioned at a distance of 30 cm above.
| Illuminant |
Maximum exposure intensity |
Maximum exposure time |
|
OSRAM PARATHOM DECO CLASSIC A Yellow 1 Watt LED E27 |
2,6 µW/cm² |
5 min |
|
PHILIPS AccentColor Miniglobe Yellow 1 Watt LED E27 |
0,8 µW/cm² |
30 min |
Direct Transmission Spectrum
Transmissions spectrum (recorded in a darkened laboratory with spectrometer according to ASTM E 0134) of the unrecorded photopolymer film after removal of the protective cover film.
Gerneral informaition on flood cure and bleaching
These are recommendations and should serve as guidelines. According to the specific equipment components and the type of product to be produced, deviations from these guidelines might be necessary. The bleaching can also be adapted to the required product performance. Example: Conditions for mercury lamps High temperatures (above 60°C at the film) should be avoided because they can lead to deformation of the substrate. Dichroic mirrors that reflect UV-light and transmit IR-radiation and a fused silica panel in front of the lamp can reduce the amount of IR-radiation and thus further reduce the temperature.The following conditions were found to be favorable:
- Photopolymer layer on substrate laminated to glass
- Dosage: 5,000-10,000 mJ/cm²• Intensity at the sample: 40 mW/cm
These data were found using a mercury lamp (MH-Strahler UV-400 H) of Hönle UV Technology (http://www.hoenle.de).
Health and Safety Information
Disclaimer
Responsibility and Liability
The use of Covestro products, technical assistance, and information (regardless of how provided) is outside Covestro’s control and is solely the responsibility of the customer. The customer must conduct adequate testing to determine the suitability of products for its intended use, including but not limited to technical, health, safety, and environmental aspects. Unless otherwise agreed in writing, all products are sold exclusively under Covestro’s standard conditions of sale, which prevail in case of conflict and are available upon request.
The terms and conditions of sale and delivery are available via the following link:
https://order.covestro.com/covestrostorefront/saleConditions
All information is provided “as is” without warranties, express or implied, including merchantability or fitness for a particular purpose, and is subject to change without notice. To the maximum extent permitted by law, Covestro disclaims, and the customer assumes all liability for losses, damages, or claims arising out of use of Covestro products, technical assistance, or information. Any statement or recommendation not expressly contained in Covestro documentation is unauthorized and shall not bind Covestro. Nothing herein shall be construed as encouraging or recommending the use of any product in conflict with any claim of any patent. No license is implied or in fact granted under the claims of any patent.
Restrictions on Regulated Applications
This product is not intended for use in regulated applications such as agriculture, cosmetics, drinking water contact, food contact, medical products (e.g., medical devices), toys, or similar uses subject to specific regulatory requirements. Prior written approval from Covestro is required before this product may be used in any regulated application. The customer is solely responsible for ensuring compliance with all applicable laws and determining product suitability. Covestro disclaims all liability and warranties for unauthorized regulated uses.
Typical Value
These values are provided as typical data only and do not constitute binding specifications or warranted performance, unless explicitly agreed by Covestro in writing. Performance may vary depending on factors including, but not limited to, mold/die, processing conditions and coloring/pigmentation. Unless otherwise stated, values are based on standardized test specimens at room temperature.
Sample
Samples provided by Covestro are intended solely for evaluation and testing purposes by the customer and may not be used in commercial applications, resold, transferred to third parties (except qualified testing service providers acting on behalf of the customer), reverse engineered, modified, or used in any manner not explicitly authorized in writing by Covestro. Samples are provided ‘as-is’ without any warranties, express or implied, including fitness for a particular purpose. Customers are solely responsible for ensuring safe handling, regulatory compliance, and suitability of the material for their intended evaluations. Covestro disclaims all liability for damages or losses arising from the use of samples.
Contact Information
Please use our contact form or contact us directly by sending an e-mail to technical-datasheets@cx.covestro.com .
