"Touch, knot, flame: how to tell authentic silk from polyester or viscose. A practical guide from the Como Maison."
The market is full of "silk scarves" that contain no silk at all. Glossy polyester, printed viscose, anonymous blends: at a careless glance they may deceive, but a few simple tests reveal the truth immediately. From those who work with silk every day – in the Como district – here are the seven tests we use to recognize real silk.
The touch test. Authentic silk is cool on contact, slippery, slightly irregular in the hand. Polyester is uniform, plasticky, sometimes even tacky at room temperature. Rub the fabric between your fingers for ten seconds: real silk warms slowly and redistributes the heat; polyester stays cold or unexpectedly overheats.
The knot test. Knot the scarf and pull gently: authentic silk holds the knot for a moment and then releases with a natural drape, without rigid creases. Polyester or nylon snap back, stay creased, or force a sharp fold that doesn't match silk's soft cascade.
The flame test (to be done with caution, on a fringe of the hem). Real silk, being a protein fibre, burns slowly, curls up, leaves a friable black ash and a characteristic burnt-hair smell. Polyester melts, forms a hard bead, and smells like chemical plastic. It is the most definitive test, but it requires care and is performed only on a stray fibre.
The light test. Hold the scarf against a light source. Real silk reflects light with a deep, faceted shimmer that shifts colour with the angle (an effect called "iridescence"). Polyester reflects flatly, uniformly, almost metallically. The more a scarf seems to "sparkle" consistently, the more likely it isn't silk.
The price test. Real silk is expensive because it is expensive to produce: about 2,500 cocoons are needed for one metre of fabric. A pure silk scarf priced below 40–50 euros is statistically improbable. Be wary of prices that seem too low: it isn't snobbery, it's supply-chain mathematics.
