Keep Smiling Glass Liner, Black, 21ml

A 21ml black 3D glass liner, the classic outline colour for stained-glass-style glass painting.

• 21ml tube with a fine nozzle for crisp, even lines
• Confirmed via multiple retailers as a Keep Smiling 3D glass liner for glass painting
• Black outline dries raised, forming a leaded-glass-style border for each colour
• Works on glass and is also used on ceramic and mirror surfaces
• The most commonly used liner colour for traditional stained-glass designs

Black is the classic outline shade for glass painting because it mimics the look of leaded stained glass, giving finished pieces a defined, professional edge once the colours are filled in. Draw your design outline first, allow it to dry completely, then paint within the raised black lines for crisp, clean colour separation. It suits everything from simple sun-catchers to detailed glass panels and decorative plates.

Work slowly and keep steady, even pressure on the tube so the outline comes out a consistent width from start to finish, since thicker sections dry more slowly and thin sections can break under paint. Give the black outline several hours to dry fully before adding glass paint, and keep a damp cloth nearby to clean the nozzle if it clogs during a long session. Those new to glass painting will find that practising on a spare glass sheet first makes the final piece far neater, and this black shade is the one to reach for whenever a design calls for a classic, traditional stained-glass border rather than a coloured or metallic one.