Sour silk is degummed. This kind of silk quilt is not washable, and it is quite high-grade.
From the production process analysis, when raw silk is processed into silk floss, it needs to be cooked with alkali to degum. After degumming, it needs to be washed with water, and then the residual alkalinity is neutralized with a little glacial acetic acid. Because glacial acetic acid smells overbearing, trace residues will have a great sour taste, so it is normal. It has no effect on human body and will evaporate soon.
Extended data:
Maintenance precautions:
1, Use: Cover the outside of the silk quilt core with a quilt cover before use, otherwise the quilt cover will be easily contaminated with dust and stains. Don't press the quilt when sleeping, and don't wrap it under your body, so as to keep the fluffy feeling of silk quilt. When using silk quilt, children should be prevented from wetting the bed and jumping on the quilt.
2. Cleaning: If the quilt cover is dirty, you can take it off and clean it with cold water. Silk quilt core cannot be washed, dry-cleaned, chlorinated and ironed. If it is stained, it is best to go to a professional dry cleaner to partially wipe it with a special detergent, and then dry it at low temperature to prevent the fabric from shrinking. If the stain is not big, you can gently wipe it with a neutral detergent.
3. Drying: If the newly-made silk quilt smells like silkworm chrysalis, it can be dried in a ventilated place for two days. Silk quilts should be aired in time, with an interval of 1-2 weeks and an interval of 1-2 hours each time. Don't expose the quilt to the sun for a long time, which will cause the silk to break. Pat it with your hand after drying to keep it fluffy.
4. Storage: It should be dried once before storage, so as to eliminate the internal moisture as much as possible. Don't store it in a humid and sultry environment, and don't put it in a plastic bag to prevent the silk from getting wet, producing peculiar smell and losing its warmth and breathability. Avoid heavy pressure, and don't pile up heavy objects on the quilt to avoid thinning and hardening. Don't use chemicals such as mothballs to avoid polluting silk.
Reference link: Baidu Encyclopedia-Silk quilt