Operation Manual

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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. However,
the
bobbin
thread
never
should
be thicker
than the
needle thread.
For embroidery
and darning
work,
a No.
50
thread
should
normally
be
used.
Mercerized
Needle
Types
of Fabrics
Silk
Cotton
Size
Fine Fabrics
0
such as
georgette, chiffon,
to
to
-or
000
batisie,
voile,
lawn, silk.
100
70
twist
Lightweight Fabrks
70
such as dress silks
and
A & B
to
80
cottons,
sheer
woolens,
80
twist
shirting,
droperies.
,
‘5
Medium
Fabrics
such
as lightweight
50
B&C
woolens,
madras,
muslin,
to
90
twist
brocodes,
heavy
silks
70
and
rayon, gabardine.
Heavy Fabrics
such as
coating,
denim,
40
C&D
corduroy,
slipcover
fabrics
to
100
twist
bed
tickings,
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
I
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