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A-682
Specification-continuity route for established light-diffusion programs
A-682 is intended for repeat orders and validation programs that already name this grade in a formulation, drawing or customer approval. Its published TDS values and MSDS material declaration overlap with A-683 and A-685, so the reason to retain A-682 is specification continuity rather than an unsupported claim of higher optical performance.
20 kg carton
TDS-derived technical profile
Key values listed for A-682
The following technical values are taken from the current TDS to support grade selection and initial formulation work.
| Property | Listed value | Condition |
|---|---|---|
| Listed dosage | 0.3-0.5% | — |
| Heat resistance | 470°C | Source TDS statement |
| Light transmittance | 30-80% | 1.2 cm diffusion plate reference |
| Haze | Around 89.2% | 1.2 cm diffusion plate reference |
| Light transmittance | Up to 93% | Extrusion reference in source TDS |
What this grade is positioned to support
- Continuity for existing A-682 formulations and customer approvals
- Repeat-order validation against an established control
- Matched haze, transmission and point-light hiding assessment
How to prepare the first evaluation
- 01
Reproduce the existing A-682 control formulation and optical geometry before changing dosage.
- 02
Evaluate the TDS-listed 0.3-0.5% range while keeping resin, thickness and LED spacing fixed.
- 03
Compare haze, transmission, colour and dark points against the approved reference part.
Technical documentation
Request current TDS Current TDS and application guidance
Source file: a-682-tds.pdf. A-682 is the established-specification route, not a claim of technical superiority over A-683 or A-685. Do not substitute another grade solely because the published TDS and MSDS fields overlap; confirm the actual part by a matched trial.