How to Identify Real Mulberry Silk: The 6A Grade Test & Comparison Guide

Is Mulberry Silk Real Silk? 

A common question we receive is, "Is mulberry silk real silk?" The answer is yes. In fact, Mulberry silk is considered the highest quality "real silk" available. Unlike "wild silk" (such as Tussah) or synthetic imitations (like polyester satin), Mulberry silk is cultivated from silkworms raised in captivity that feed exclusively on mulberry leaves. This results in a fiber that is smoother, stronger, and more uniformly colored than any other variety.

When shopping for products like mulberry silk pillowcases, duvets, or sarees, knowing how to distinguish authentic 6A grade silk from regular silk or fake alternatives is crucial for your investment.

Mulberry Silk vs. Regular Silk vs. Synthetic: What's the Difference?

Before testing your fabric, it is important to understand what you are comparing.

How to Identify Genuine Mulberry Silk

If you want to distinguish premium 6A grade mulberry silk from synthetic alternatives, there are proven methods you can use at home.

 1. The Luster Test (Visual Inspection)

Real mulberry silk interacts with light in a unique way.

• The Pearl Effect: Genuine silk possesses a structural property that refracts light, giving it a pearly, shifting sheen. As you turn the fabric, the color appears to change slightly.

• Vs. Synthetic: Fake silk usually has a flat, white glare that shines equally from all angles, looking more like plastic.

• Check for 6A Quality: High-quality 6A grade mulberry silk will have long, continuous threads with very few impurities or broken strands.

2. The Touch and Temperature Test

Feel the fabric with your bare hands.

• Temperature: Real silk is a breathable protein fiber. It should not feel cold like metal or hot like plastic; it instantly adapts to your body temperature.

• The "Dragging" Sensation: When rubbing the fabric between your fingers, real silk offers a tiny bit of resistance (friction) and is not endlessly slippery. Synthetic satin often feels distinctively "oily" or overly slick.

3. The Sound Test (The "Silk Scroop")

This is a traditional method used by experts.

• Action: Take two layers of the fabric and gently rub or crunch them together.

• Result: Real mulberry silk produces a distinctive crunching sound, historically known as the "Silk Scroop" (similar to stepping on fresh snow).

• Fake: Synthetic fabrics usually produce a low, dull sound or no sound at all due to their smooth plastic surface.

4. The Burn Test (Definitive Method)

(Note: Only perform this in a safe environment with a small thread sample from a hidden seam)

This is the most accurate way to tell if mulberry silk is real.

• The Flame: Real silk burns slowly and may struggle to stay lit.

• The Smell: Because silk is a protein (like hair), burning it smells like burning hair or feathers. Polyester smells like burning plastic or chemicals.

• The Residue:

  • Real Silk: Leaves a brittle, black, gritty ash that turns to powder when pinched.

  • Synthetic: Melts into a hard, plastic bead that cannot be crushed.

 you want to distinguish mulberry silk from synthetic alternatives, there are proven methods you can use at home. Here are simple tests to help you identify genuine silk fabric:

Where to Buy Authentic Mulberry Silk? 

When looking for pure mulberry silk sarees or silk sheets, price is often an indicator. Producing mulberry silk is a labor-intensive process. If a price seems "too good to be true" (e.g., a $10 silk sheet set), it is likely synthetic or a low-grade blend. Always look for certifications specifying "100% Mulberry Silk" and check if the product is rated 6A Grade for the highest durability and softness. You need to know that natural mulberry silk is not cheap, so you can't expect to buy real mulberry silk at a low price.