Spin speed and what it does to the fabric
Short answer: Choose 600 to 800 revolutions for bamboo fabric. Higher speeds press creases into the fibres and cause more wear than the wash itself.
What happens at high speed
The fabric is pressed hard against the drum wall and sits there in sharp folds. In wet viscose those folds set, and they are exactly what you later see as creases that will not come out.
What you gain by turning it down
Fewer creases, less wear and a longer life. In return the laundry is wetter coming out and takes longer to dry. See bamboo clothing for women.
Where it matters most
In t-shirts, dresses and anything that should look smooth. In towels and bedding you can happily spin faster. See bamboo dresses and bamboo towels.
Frequently asked questions
How much longer does drying take
At 600 rather than 1200 revolutions, typically a couple of hours more on the line.
Can you spin a second time
Yes, but at a low speed if the fabric is delicate.
Does the laundry end up damper in the wardrobe
Only if you fold it before it is completely dry.