Silk is degummed (removal of
sericin) and subsequently, the natural color is removed. A degumming treatment
can be either partial or complete which gives a typical silk luster and soft
hand. Degumming of silk can be carried out as follows.
Assessment of scouring:
- Determination of weight loss %.
- Absorbency test.
Determination of weight loss %:
The weight of unscoured and scoured sample is taken at the same MR% and from
these data total weight loss % can be calculated. The weight of the scoured sample
is less than the unscoured sample.
Standard weight loss % is 4-8%
(Acceptable).
If it is 8% than we may say that
the sample is well scoured but if it is >8% than it is not acceptable as it
indicates that the fiber damage ahs taken place. If it is <4% it indicates
that the sample is not well scoured and there are impurities still present in
the sample.
Absorbency test:
- Immersion test: A sample is more absorbent when it is scoured. 1cm×1cm sample is placed on the water surface and time taken by it to be immersed is noted. The standard time is 5sec. If it is up to 10sec, we say than the sample is well scoured. It is >10sec then the scouring has not taken place properly.
- Drop test/spot test: Colored solution of 0.1% direct dye (red) is used. The solution is dropped on the sample by pippet and its absorbency is examined visually. The drop may be the following shape when scoured. If the drop is circularly then we may say that the sample is well scoured. If the drop is circular but small area, then we say that the sample is uniformly scoured but not well scoured. If the drop is almost circular then the sample is uniformly scoured too. If it is not circular, we say that the sample is not uniformly scoured.
- Wicking test: A sample of 18cm×5cm is taken and a mark is made at 1cm from bottom. The 1cm portion is immersed into 1% direct dye solution for 5min and then the distance travelled by the colored solution above 1cm is noted. The acceptable range is 30-50mm.
Due to this, sheets manufactured using this technique are wrinkle resistant and durable. silk bed sheets queen No pesticide or toxic material is used in making of these sheets and they are so soft it is much liking sleeping on a cloud (if you have ever done that).
ReplyDeleteThis web site may be a walk-through like the information you wanted relating to this and didn’t know who ought to. Glimpse here, and you’ll undoubtedly discover it. why not look here
ReplyDeleteThis website is awesome. I constantly come across something new & different right here. Thank you for that data. Visit Website
ReplyDeleteThis is on the grounds that the texture is agreeable and mitigating which is useful for acceptable rest.Pure silk bedding
ReplyDeleteSilk is a characteristic texture that is very much appreciated for the capacity to give ultra smooth feel and a beautiful look.100 silk bedding
ReplyDeleteOffer this article on FacebookShare this article on TwitterShare this article on LinkedinShare this article on DeliciousShare this article on DiggShare this article on RedditShare this article on PinterestExpert Author Peter Zelst 100 silk bedding
ReplyDeleteThere are numerous thrilling models of silk bed sheets that are accessible on the lookout. black silk sheets
ReplyDeleteDozing on silk pillowcases is suggested by numerous hairdressers for individuals who have long hair since it assists with holding hair back from getting tangled. silk bed sheets
ReplyDelete