Silk is a fine fabric, is generally measured by “momme weight” or "GSM weight"
(GSM refers to grams per square meter of fabric) instead of thread count. Momme (mm) are units of weight traditionally used to measure the surface density of silk. It is alike to the use of thread count to measure the quality of cotton fabrics. Silk can also be measured by weight in grams. 1 momme = 4.340 GSM. The higher momme fabric is thicker in texture and of higher value due to the higher content of silk per square meter.
The higher the weight in momme, the more durable the weave, and the more suitable it is for heavy-duty use.
Why there are so much difference in price of silk duvet? We hope the following information will help you to make a right decision.
• Cotton casings: the most popular and economical, Choose the cotton fabric above 250 TC(Thread Count).
• Silk casings: ideal, but pricy. A silk casing should have at least 17momme. Lower than 17momme you could encounter durability issues.
• Long-filament mulberry silk , short-filament mulberry silk, wild silk( Tussah Silk)
• Hand extracted silk ﬁlling, machine extracted long filament silk ﬁlling,
Pure mulberry silk is finer and feels very soft and has a natural pearl color. It smells fresh. Tussah silk (wild silk) are rougher, coarser and have a brown color and is less luxury as filling for silk duvets. Treated tussah has pale color, and disordered texture.
Hand extracted long mulberry silk is washed and stretched by hand, natural dried in the air. There are no additives, softeners or bleach added. It smells fresh and has a natural color. Many layers are used to make one duvet ﬁlling, between layers is air trapped. Hence these duvets are more airy, softer and springier. They are far superior in comfort, durability, quality and beneﬁcial for the health.
Machine extracted silk can be produced quickly. Less air is trapped and chemicals have been used to whiten the silk and to make it softer and ﬂuffier. Thus it feels heavier with less spring.
Machine silk has a whitish color. This cheaper, streamlined, industrial process of silk extraction means a loss of the beneﬁts associated with silk ﬁllings produced by the traditional methods: the health, anti-allergy properties and the environmental advantages
Long-filament mulberry silk is what you should be looking for in your duvet. Cheaper silk duvets are almost filled with chopped strand silk which is essentially off cuts of silk that can't be used for anything else.
The weight of silk filling: Our silk duvet has three weights:
• (180 gr / m²) is ideal for the hot season (sommer)
• (320 gr / m²) is ideal for mid-season
• (180 + 320 gr / m²) consists of a summer duvet and a mid-season duvet to use separately or together to get a very warm duvet for the winter.
A good silk duvet will have an long inspection zip where we can inspect the quality of silk inside the duvet.
silk duvet with stitching tread or modeling is mainly the relatively low quality product made of short silk thread, mechanically processed silk or spun silk waste, therefore must always be stitched to prevent the filling slips. The silk filling is compressed and less airy. High-quality silk quilt needs no stitching, is not quilted. Since the silk thread always runs the entire width of the duvet, it must only stitched on the edge and some romdom point, the the filling will be on place.
1: Seam or seamless
Cheap silk sheets or duvet covers are often with seams, they use small width silk fabric and sewing them together either in the middle or on the both sides. Seamless silk bed linen uses the silk which is woven on very large looms so there are no seams. It is more expensive and more luxury.
Momme (mm) is the unit of weight per square meter silk. Momme has traditionally been used to measure the density of silk.
The higher the weight in momme, the thicker the fabric is and the better it is resistant to heavy use. The higher the momme the more expensive is the fabric.