Cotton can withstand high temperatures. Since cotton fibers are fairly inelastic cotton fabrics may wrinkle easily. And, fabric may need frequent pressing. Cotton can be ironed with a hot iron, and does not scorch easily.
Some linen is washable, while others are dry clean only. Be sure to check the label. Linen fabrics may need frequent pressing. For specific instructions, always refer to the garment's sewn-in care label.
Iron slightly damp on the front side with warm iron
Turn the garment inside out and press dry or nearly dry with warm iron or steam. When possible, press on the reverse side of the fabric.
Press with a cloth to avoid scorching, using a warm iron or steam iron. When possible, press on the reverse side of the fabric.
If needed, use moderately warm iron.
Nylon or Polyester:
Iron nearly dry, on the wrong side with a warm iron.
A high temperature iron setting will be required for most acetate fabrics.