The Serti (closing or fence) technique is the silk painting technique where designs are formed with gutta or water-based resists, which are applied to silk that has been pre-washed, dried and stretched (on a stretcher). Once the gutta or water-based resist has dried, it acts as a barrier for the dye or paint—keeping the color within the outlined areas of the design and allowing you to achieve sharply defined borders. (Without this barrier, the dye or paint would flow into more of an abstract, undefined pattern.) After the dye or paint has been properly set, the clear gutta or resist is removed and a defining line the color of the original fabric remains. Colored guttas and resists are also available that are meant to remain in the fabric.

Watercolor-like effects can be achieved by applying dye or paint to silk that has been pre-washed and put on stretcher bars whether or not you are using resists (but not if you are using stop-flow). Dyes or paints are applied to the silk with a paint brush, mist sprayer, eye dropper, or other tools to achieve abstract effects. Spraying the silk lightly with water before adding color increases the flow of the dye or paint. Sprinkling silk salt on the piece when still wet, and leaving till completely dry before brushing off the salt, produces interesting textural effects. Applying alcohol to dye-painted silk also creates beautiful effects.

Detailed patterns without resists can be achieved by instead priming the prewashed and stretched silk with a stop-flow primer which is left to dry before painting on the dyes or paints. The color will stay where you put it, rather than migrating. Allows for freehand painting without gutta or water-soluble resists. Think of stop-flow primers as starch-like sizing to prepare the canvas with. They wash out in the end.