Размерный ряд шёлковой нити для вязания в руках
http://info.fabrics.net/vintage-thread- ... o-gallery/Machine Twist is the silk on spools ordinarily termed silk thread and is composed of three strands of thrown silk. It was first manufactured
in 1852 to meet the requirements of the sewing machine for something smoother than the old sewing silk. Machine twist is stretched by
special machinery before finishing to insure smoothness and evenness – a very important process-after which it is cleansed and dyed.
Silk is not chemically weighted.
Sizing of machine twist is not based on any reference to textile thread sizes but has an irregularity all its own. Lettering is according
to each manufacturer’s own schedule, although there is slight variation. Thread is put on spools according to weight and yardage of the
size or letter in an ounce varies according to the thickness and strength of the silk; long yardage represents a weaker thread than short
yardage.
Most manufacturers prefer giving quality to mere length and false lettering. Point of starting is letter A, being the ordinary or
medium size and in the best threads should measure 900 yards in full 12-oz. goods; the sizes should increase and decrease by 100-yard
lengths, approximately. Manufacturers state the following table of sizes to be approximate but not absolute:
000 = 1250 to 1300 yards in an ounce [YIO]
00 = 1110 to 1150 yards in an ounce
0 = 1000 YIO E = 500 YIO
A = 900 YIO EE = 400 YIO
B = 800 YIO F= 300 YIO
C = 700 YIO FF = 200 YIO
D = 600 YIO G= 100 YIO