HDupont Colourless Serti / Gutta – Invisible Outliner for Silk Painting

The Invisible Foundation of Professional Silk Painting

H. Dupont Colourless Serti (Gutta) is an essential outlining medium used in silk painting to prevent colours from running and spreading across the fabric. Without gutta, precise silk work is simply not possible.

This colourless formulation allows artists to outline areas of colour without leaving visible marks, making it ideal for clean, refined, and professional results. Once applied, it dries quickly and forms a watertight barrier that controls dye or paint flow.

The gutta is odour-free and solvent-free, ensuring a comfortable studio experience. After colour fixing, it can be completely removed using Essence F thinner, leaving the artwork visually clean while preserving colour accuracy.

Why Use Colourless Serti Gutta?

• Prevents colour bleeding on silk
• Invisible outlines – leaves no visible marks
• Essential for precise, controlled designs
• Dries quickly for efficient workflow
• Odour-free and solvent-free

How to Use (Recommended Practice)

1. Apply the gutta to silk using an applicator bottle and nib
2. Allow it to dry completely (dries quickly)
3. Test watertightness before painting
   • Drip a little water onto the silk, or
   • Hold silk up to the light to check for gaps
4. Apply silk colours within the outlined areas
5. After colour fixing, remove gutta using Essence F thinner if required

Note: A slight residue may remain on silk after fixing and before removal.

Available Sizes

• 25 ml – Ideal for detail work and sampling
• 100 ml – Regular studio use
• 250 ml – Advanced artists and workshops
• 1 Litre – Institutions, schools, and high-volume studios