Thread
The most common size of thread is size 10. The higher the number
the thinner the thread. Thinner sizes go down to 100. Thread is
generally available down to size 30 or 40.
Some thread crochet items need to be a particular size, and
therefore you need to use the size of thread recommended in the
pattern. Other items such as edgings can be made in the size of
thread you prefer.
It can take a while to get used to using finer thread. One way
is to gradually work downward, rather than switching between a
fine thread project and a heavier size. The size of thread
you're currently working with comes to feel normal to you.
You may have to look around to find good quality thread, but
it's worth spending a little extra money on. There are a number
of differences between types of threads.
Luster means a shimmery, satiny shine. Mercerization is a
chemical process done to thread, which chemically burns the fuzz
off and hopefully makes it shimmer. Almost all crochet thread is
mercerized.
Fuzzy thread can feel soft, but fuzz works against luster, so
things made from fuzzy thread won't have a satiny shine when
completed. The major problem with fuzzy thread is that it makes
your finished work more likely to attract and hold dust, pet
hair, and other fluff. Items made from fuzzy thread tend to get
fuzzier with even gentle washing.
Better quality thread has more twist. A thread with insufficient
twist can cause you to split stitches and it can separate in
your finished work giving a stringy look. Thread without enough
twist gets increasingly fuzzy as you stitch. Thread with a good
twist stays smooth and even and retains its luster.
There are two reasons for thread to feel stiff. Some have some a
sort of starch or sizing on them. Others have such an intense
twist. Tightly twisted thread bends well but starchy threads
bend awkwardly, making stitches look uneven. Starchy thread can
also leave a residue on your hands. Some crocheters like this
kind of pre-starched thread, because it saves having to starch
work afterwards.
Six-cord cotton comes apart into three plies, each made up of
two smaller plies twisted together in the opposite direction.
They are smooth, dense, and shiny and not fuzzy. Perle cotton is
meant for embroidery, but can be used for crochet. However, you
should only use it only for items that don't get much wear. As
it has a gentle twist, it doesn't wear well.