Recommended Needle And Thread Sizes - Pfaff 90 Instruction Book

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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 an the bdbbin. Some experienced seamstresses
prefer a somewhat thinner bobbin thread. How
ever, the bobbin thread never should be thicker
than the needle thread.
For embroidery and darning work, a No, 50 thrçad
should normally be used.
-
Mercerized
Needle
Types of Fabrics Silk
Cotton
Size
Fine Fabrics
80
0
to
such as georgette, chiffon,
to
or
000
botiste, voile, lawn, silk. 100
.
70
twi
St
Lightweight Fabrics
70
such as dress silks arid
A & 3
to 80
cottons, sheer woolens,
80
tWist
shirting, draperies.
Medium Fabrics
such as lightweight
50
B&C
wooiens, madras, muslin,
to 90
twist
brocades, heavy silks
70
and rayon, gabardine.
Heavy Fabrics
such as cooting, denim,
40
C&D
corduroy, slipcover fobrics,
to
100
twist
bed ti&ings, lightweight
50
canvas.
Synthetics, Rayon, Acetate
Determined
Determined by weight
including nylon, orion,
of fabric 40 to 50
by thread size
dacron, plastics, etc.
60 to 80
12
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