Operation Manual

.
Hercerize
. Needle
Types of
Fabrics
Silk
Cotton
Size
Fine Fabrics
80
0
60
such as
georgette,
chiffon,
to
or
batiste,
voile, lawn, silk.
100
twist
70
Lightweight Fabrics
such
as dress silks and cottons,
70
A
& B
80
sheer woolens, shirting,
dra-
to
twist
peries.
80
Medium Fabrics
such as
lightweight woolens,
50
&
madras,
muslin, brocades,
to
90
heavy
silks and rayon,
70
twis
gabardine.
Heavy
Fabrics
such
as
coating, denim,
cor-
40
c
& D
100
duroy, slipcover
fabrics, bed
to
twist
tickings,
lightweight canvas.
50
Very Heavy
Fabrics
24
90
such as
heavy tickings, canvas,
to
E
to
overcoating, sailcloth,
up-
40
twist
110
holstery
Synthetics, Rayon,
Acetate
Determined by
Determined
including
nylon, orion, dacron,
weight of fabric
threal size
plastics,
etc.
40 to 50
60
to 80
Recommended
Needle
and
Thread
Sizes
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.
12