If I put polyurethane over the food color stained wood, will the moisture damage the food coloring?

Want to stain a intarsia project with some food coloring? If I polyurethane the project afterward, will it last through some moisture and humidity?


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    One Response to “If I put polyurethane over the food color stained wood, will the moisture damage the food coloring?”

    • HyperDog:

      Polyurethane coatings are waterproof. Water is only a problem if the wood is not entirely coated and water remains in contact with any bare spots on the wood – it soaks right in to those spots and can generate enough vapor pressure under nearby coating material to damage it, even make it blister or peel.

      You may want to test the coloring/coating process on a scrap piece of wood to see if the polyurethane affects the coloring. With conventional wood stains, a clear coat will usually darken it and make the wood grain more visible.

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