Certainly! Below is an example structure of a CSV file that you can use to log the testing data for milling plastic. Make sure to save this with a `.csv` file extension (e.g., `milling_plastic_data.csv`).

```csv
Mill Diameter (mm),Material,Depth of Cut (mm),Speed (RPM),Feed Rate (mm/min),Tool Material,Cooling Method,Surface Finish Quality,Observations
10,ABS,2,1500,300,Carbide,Air Blast,High,Smooth finish with slight burrs
8,Polycarbonate,1.5,2000,250,High-Speed Steel,Cooling Fluid,Medium,Good finish but some melting
12,Nylon,2.5,1300,280,Carbide,Air Blast,High,Excellent surface finish
6,PVC,1,1700,220,Carbide,Air Blast,Medium,Finish shows some tool marks
10,Polypropylene,2,1400,260,High-Speed Steel,None,Low,Surface shows significant roughness
```

### Column Descriptions:
- **Mill Diameter (mm):** The diameter of the milling tool in millimeters.
- **Material:** The type of plastic material being milled (e.g., ABS, Polycarbonate, Nylon, PVC, Polypropylene).
- **Depth of Cut (mm):** Depth of the cut in millimeters.
- **Speed (RPM):** The rotational speed of the milling tool in revolutions per minute.
- **Feed Rate (mm/min):** The rate at which the tool advances into the material, measured in millimeters per minute.
- **Tool Material:** The material of the milling tool (e.g., Carbide, High-Speed Steel).
- **Cooling Method:** The method used for cooling during the milling process (e.g., Air Blast, Cooling Fluid, None).
- **Surface Finish Quality:** A qualitative measure of the surface finish (e.g., High, Medium, Low).
- **Observations:** Any additional notes or observations regarding the milling process and results.

### Instructions:
1. Open a text editor or spreadsheet application (like Microsoft Excel, Google Sheets, etc.).
2. Copy and paste the above CSV data into the application.
3. Save the file with a `.csv` extension.
4. Whenever you conduct a milling test, fill in the appropriate columns with the relevant data.

This CSV template should help you systematically log and analyze the results of your plastic milling tests.