BIVOLTINE RACE AND

e.g. Conelitionec weight of raw silk : 110.21, g
Singie cocoon weight of green cocoon = 1.95 g
Unreeled cocoons : (fully 1, middle 3);
Carry over cocoo.,.s : (outside 26, middle 27, innerside 7)(auto)
carry over cocoon5 = (outside 10, middle 15, innerside 7)(multi)
b. 300'2-(29 + 1) :268(auto)
300-2-7 = 29i. (multi)
* Raw silk percentage
9.4. Conversion table
Length (unreeled) :
Weight (unreeled) :
1.00p +
1.00p +
Length (carry over) = 0.58h +
Weight (carry over) : 0.43h +
0.58h +
0.43h +
0.24m + 0.061
0.14m + 0.031
= (Il0.2I 1 1.95 x268)x100
: (110.21 I 1.95 x 29 1)x100
21,.09 % (auto)
19.42 Vo (mdti)
0.24m + 0.061
0.14m + 0.031
multi end reeling machine
multi end reeling machine
multi end reeling machine
multi eni reeling machine
Length : 1.00p + 0.85h + 0.37m + 0.111
Weight : 1.00p + 0.80h + 0.28m + 0.061
Automatic reeling mac lne
Reelability 42 Vo .
(vo) below
+
9.5. Degumming @oil-off-loss)
43%-
52%
s3%-
62 %o
63%-
72%
automatic reeling machine
automatic reeling machine
73%-
82%
83%-
above
-4 ",
+1 +3
Degumming is a process of removing the sericin or gum from silk yarn or fabric by boiling
with soap solution. Degumming is also called "Boil-off-loss'i
Boil-off-loss is required to be determined to provide better cohesion and strength to the
yarn. If boil off loss is more the strength of the yarn decreases. Gum is required to give a better
finish to the multi stridted fibrils. Hence, optimum sericin loss with refeience to cocoon shell
should not exceed more than 24Vo.
The following procedure is adopted for estimation of Boil- off-loss with reference to
cocoon-shell.
-
-
-
l0 Cocoon-shells are dried at 105.C for 5 hours.
Keep the cocoon shells in the dessicator for 30 minutes.
Record total shell weight.
- Put into a bag (hemp/cotton cloth).