Silkworm

' Y;t;#ii:fl."nnt
do not ser crurnbled, making their separarion difficutr durins rhe toose egs
u 3:['."'"us
emanation of acid fumes may affect the heatth of the technicians conducting the treat-
6 Liberated fumes may damage the equipments and fixtures of the chamber.
7 Acid treatment baths often go out of order and their maintenance is difficult.
Cold acid treatment
This is commonly referred to as Room temperature acid treatment methodas the treatment is
performed at room temperature. since no heating of ".io
lrln*lved, some authors have chosen to call
i:T#3: '"ated acid treatment- tn tnis contexr, rJom tu*puritr* refers to a temperature range or 23oc
The specific gravity of HCI required is 1.10 (as measured
wilh
at 15"c
20"/"
o,r
concentration'
1.0g6 specif ic gravity ln practice, at 25"c)
tne soar