Why Does Resin Change Colour Around Embedded Objects?

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Why Does Resin Sometimes Change Colour Around Objects?

Embedding objects in resin can occasionally lead to patchy discolouration, such as cloudiness or yellowing around the embedded item. Understanding why this happens helps you achieve the pristine results you want for resin art, jewellery, or custom woodwork.

What Causes Discolouration in Resin?

The most common reasons for resin changing colour around embedded items are moisture and the object’s surface properties. Objects that haven’t been properly dried or sealed can interact with the liquid resin, resulting in a cloudy or yellowed appearance at the boundary. Organic materials, porous items, or those with residual moisture are especially likely to show this effect.

How to Prevent Cloudiness and Yellowing

Dry thoroughly: Ensure that all items you want to embed are completely dry. Even small amounts of moisture can trigger unwanted reactions once in contact with resin.
Seal porous or delicate objects: Apply a suitable sealer (such as a clear-drying varnish or specialist resin sealer) to items like flowers, wood, or fabrics. Sealing prevents resin from soaking in, reducing the risk of colour changes.
Choose the right resin: For clear results with layers up to 2cm thick, a high-clarity resin like “Trasparente” Multipurpose Clear Epoxy Resin is ideal. For deeper projects, opt for resins formulated for thick pours.

When This Matters Most

If you are creating items where a clear, professional finish is the focus—such as jewellery, table inlays, or keepsakes—taking these precautions is essential. Visible discolouration can detract from the overall effect, so attention to preparation makes a real difference.

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How Do You Put Things Under Resin

Getting crisp, clear results when putting things under resin is all about preparation. For more advice and in-depth guidance, explore our main page on how to put things under resin.