Decalsiirto

Decalsiirto, or decal transfer, is a technique for applying printed designs to a surface using a thin, pre-printed film carrying ink and an adhesive layer. It is widely used in model making, automotive detailing, signage, and decorative work. The two main types are water-slide decals, which require soaking in water to release the decal from its paper backing and then sliding it onto the target surface; and self-adhesive decals, which have a pressure-sensitive adhesive and can be applied directly. A dry-transfer variant transfers the design by pressure, without a liquid.

Application process: choose a clean, dry substrate; cut or trim the decal if necessary; for water-slide, soak to detach; position on the surface and slide the decal into place; remove excess water and air bubbles with a soft tool or tissue; allow to dry; if needed, use a decal setting solution to improve conformity on curves; finish with a clear coat to seal and protect.

Materials and surfaces: decal films are usually polyester or cellulose-based; adhesives differ between water-slide and self-adhesive formats; compatible substrates include plastic, metal, glass, wood, and painted surfaces.

Durability and limitations: decals can be affected by moisture, heat, and UV light; improper handling can cause silvering, tearing, or edge peeling; sealed with a compatible clear coat, decals can last with proper care but may still be prone to chipping on high-wear surfaces.