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The appearance of the finished seam is dependent
on the correct relationship between needle, thread
and fabric. Select the proper thread sizes and
needles from this chart.
The same size threads should be used in the needle
and on the bobbin. Some experienced seamstresses
prefer a somewhat thinner bobbin thread. How
ever, the bobbin thread never should be thicker
than the needle thread.
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Typos of Fabrics
Mercerized
Silk
Needle
Cotton
Size
0
Fine Fabrics
80
60
to
such as georgette, chiffon,
batiste,
to
000
or
voile, lawn, silk.
ioo
70
twist
Lightweight Fabrics
70
such as dress silks and cottons,
A & B
to
80
sheers, woolens, shirting, dra.
twist
80
peries.
Medium Fabrics
50
such as lightweight woolens,
to
B & C
90
madras, muslin, brocades, heavy
twist
70
silks and rayon, gabardine.
Heavy Fabrics
40
such ascoatlng,denim, corduroy,
to
C&D
slipcover fabrics, bed tickings,
twist
lightweight canvas.
50
Very Heavy Fabrics
24
90
such
as heavy TIcKrngz, canvas,
to
E
to
overcodting, sailcloth, up
twist
40
110
hoistery,
Synthetics, Rayon, Acetate
Determined by
Determined
including nylon, orion, dacron,
weight of fabric
bythresdsiz
plastics, etc.
40 to 50
60 to 80
16
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