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Creating a deep resin casting or encasing objects like a preserved fish means you must follow specific guidelines. When your project’s thickness is greater than the manufacturer’s recommended limit for a single pour, casting in stages is essential for best results and safety.
Why Resin Should Be Poured in Layers
Epoxy resin generates heat as it cures. Pouring too thick a layer can trap this heat, leading to uncontrolled reactions, discolouration, or even cracks. To avoid these issues and ensure your casting sets properly, always follow product-specific maximum layer thickness.
- Reduces risk of overheating and surface imperfections.
- Prevents bubbles and ensures top clarity around embedded objects.
- Lets each layer cure before adding the next for a seamless result.
How to Layer Resin for Deep Castings
Start by confirming your resin’s maximum recommended pour depth – for example, Epoxytable 10-Ten handles up to 10cm, but even then, large or complex projects often benefit from layering. Pour the first batch, let it partially set, and then repeat until the total depth is reached. Each layer should bond with the next while still slightly tacky for best adhesion. Patience at this stage is key to clarity and a strong final piece.
When Pouring in Stages Matters Most
If embedding larger objects (like a dead fish) or filling very deep moulds, staged pours not only protect your piece but also help maintain transparency and prevent yellowing. Projects with sides over 100cm or weights beyond product guidance especially benefit from a careful, layered approach.
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Pouring resin in multiple stages might take more time, but it’s the surest method to achieve strong, clear, and safe deep castings—foundational knowledge for creative projects like embedding delicate items. For broader guidance on working with resin and object embedding, see our parent guide.