Operation Manual

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.
iftuwn? /l4?e?1
an ‘7h&’a? $i.c
Or
ar
sy
13
n<
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