Bernina Artista 640 User Manual page 15

Important Facts About Thread and Needles
With the right combination of thread and needle optimum sewing results are
achieved.
Thread
The thread is chosen according to use. For a
perfect sewing result, thread and fabric quality
play an important role. It is recommended to
use quality brands.
Cotton Thread
• cotton thread has the advantage of a
natural fiber and therefore is especially
suitable for sewing cotton fabrics
• if cotton thread is mercerized it will have a
slight sheen
Polyester Thread
• polyester thread is suitable for practically all
sewing needs
• it has a high tensile strength and is
particularly colorfast
• polyester thread is more flexible and is
recommended where a strong and elastic
seam is required
Needle, Thread and Fabric
Care must be taken when choosing needle
and thread.
The correct needle size does not only depend
on the chosen thread, but also has to be well-
suited to the fabric used. The fabric weight
determines the thread weight and needle size
and point form.
The following are the guidelines:
fine fabrics:
fine thread (darning thread,
embroidery thread)
mediumweight fabrics:
normal thread
heavyweight fabrics:
heavier thread
Operating instructions
Needle No.
70–75
80–90
100, 110, 120
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