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A-685
Economy-oriented route for cost-controlled light-diffusion trials
A-685 is the cost-conscious route for projects that can approve a grade through a controlled side-by-side trial. Its published TDS values and MSDS material declaration overlap with A-682 and A-683; selection therefore depends on procurement priorities, current supply and performance on the actual PC, PMMA, PS, PP or PET part, not on an invented technical downgrade.
20 kg carton
TDS-derived technical profile
Key values listed for A-685
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
- Cost-conscious qualification for new optical formulations
- Side-by-side approval against the A-683 starting grade or an existing A-682 control
- Matched haze, transmission and point-light hiding assessment
How to prepare the first evaluation
- 01
Prepare A-685 and the comparison grade in the same resin lot and at the same starting dosage.
- 02
Keep thickness, colour, LED spacing and processing conditions identical during the 0.3-0.5% trial.
- 03
Approve the grade only after comparing haze, transmission, dark points and finished-part appearance.
Technical documentation
Request current TDS Current TDS and application guidance
Source file: a-685-tds.pdf. Economy positioning is a commercial selection role, not proof that A-685 is technically identical to A-682 or A-683. Confirm the current supply offer and lot sample before changing an approved formulation.