Mixing Conversion Varnish involves carefully combining the base varnish with a specific catalyst according to the manufacturer's instructions, typically 1 part Catalyst to 10 parts Conversion Varnish. This precise mixture is crucial for the finish to cure properly and achieve its intended durability and sheen.
Conversion varnish is a high-performance, acid-curing finish widely used on cabinetry and furniture. Unlike simple varnishes, it requires the addition of a catalyst just before application, initiating a chemical reaction that allows it to harden into a tough, protective film.
Based on the provided reference, here's a breakdown of how to mix Conversion Varnish correctly:
Steps for Mixing Conversion Varnish
Proper mixing ensures the catalyst is evenly dispersed throughout the varnish, which is essential for a consistent cure and finish.
1. Prepare the Base Varnish
Before adding the catalyst, always stir Conversion Varnish in the can thoroughly. This ensures that all components, especially flattening pastes that control the sheen, are fully suspended. Stirring helps maintain a consistent appearance across your project. Using a pour fitting on the can can help keep the rim clean and prevent contamination.
2. Measure the Components
Accuracy is key when mixing catalyzed finishes. The specific ratio for Conversion Varnish, as stated in the reference, is:
Mix 1 Part Catalyst to 10 Parts Conversion Varnish, Measured by Weight or Volume.
You can use calibrated mixing cups marked for volume or a scale for weight, depending on your preference and the tools available. Both methods are acceptable according to the instructions.
3. Combine and Mix
Carefully pour the measured catalyst into the measured conversion varnish. Stir the mixture gently but thoroughly. Avoid vigorous shaking, which can introduce air bubbles. Ensure the catalyst is fully incorporated.
4. Mind the Pot Life
It's critical to only mix what you will use. Once Catalyst is added, Conversion Varnish has a limited pot life. This means the chemical reaction begins immediately, and the mixture will eventually become unusable as it starts to gel or cure in the container. Plan your work and mix smaller batches if necessary to avoid wasting material.
Conversion Varnish Mixing Ratio
Adhering to the correct ratio is vital for the finish's performance. Mixing too much or too little catalyst can lead to improper curing, resulting in a finish that is too soft, too brittle, or doesn't achieve the desired hardness or chemical resistance.
Here is the recommended ratio from the reference:
| Component | Ratio | Measurement Method |
|---|---|---|
| Conversion Varnish | 10 Parts | Weight or Volume |
| Catalyst | 1 Part | Weight or Volume |
Always double-check the specific product's technical data sheet, as ratios can sometimes vary slightly between manufacturers, although 10:1 is a common standard for many conversion varnishes.
By following these steps and the precise mixing ratio, you can ensure your Conversion Varnish cures correctly, providing a durable and beautiful finish for your woodworking projects.
