Grade A Silk
Grade A silk, top grade silk, has long strands, contains almost no impurities and has a pearly white color with a healthy sheen to it. To hold the silk floss filling in place during the process of making grade A silk comforter, workers need to stitch the long silk floss filling to the edge of the comforter. This kind of comforter is simply two layers of fabrics with a cloudy silk filling in the middle with even thickness all around.
Grade A silk has very little clumps of silk which will get clumpier and create air pockets in the nearby area over time. It will get clumpier when it gets rubbed over and over against cover fabrics, greatly diminishing the even warmness of a silk comforter. Since grade A silk contains minimal clumps, you will feel warm all the time. However, silk comforter without clumps can maintain its initial silk floss batting structure, enhancing the longevity of silk comforter.
Grade A silk feels soft and light. Grade A silk comforter has strong breathability. Sleeping it likes sleeping on a cloud. Silk comforter smells sweet, offers comfort and calm.
Grade B Silk
Grade B silk contains clumps. Grade B silk has some impurities and requires chemicals to make the silk look pearly white. Grade B silk has short strands. Silk comforter made of grade B silk needs stitching, diminishing the comfort of a silk comforter. Compared with grade A, grade B silk feels rough and lacks a natural sheen.
Grade C Silk
Grade C silk has short strands, lots of impurities with a cotton-like texture and yellowish color. Actually, grade C silk is the most inner layer of silk and has short strands. It contains oil from the silk worm making it look yellow and often has brown dots. Stitching is necessary when making comforter with grade C silk, which severely damages the breathability and lightness.