These "hot fix" fibers may be heat bonded together to produce a non-woven type of fabric. Heat bonding occurs when the fibers soften and fuse together. The temperature required is dependent upon several variables including heat, dwell time and applied pressure. Approximate bonding temperatures around 225 degrees Fahrenheit. Since temperature gauges on irons vary widely, it is best to test a small amount to determine your correct bonding temperature. Place a small amount of fiber between two Teflon Sheets. Heat iron to "Silk" setting. With a little pressure, iron the fibers for 5 seconds, turn over and iron again.
The bonded Angelina can be glued or sewn on to fabrics or paper. It can also be into integrated into roving just take the two and mash them together until you get your desired result. Once you are happy with the look it can be needle felted into other pieces.
There is no difference in the use of the Metallic or Crimped vs Straight cut. They are bonded and used in exactly the same way. They just have a different look. The straight cut and metallics (which are straight cut) are 15 denier. The metallic is actually a mix of their metallic angelina, which is NOT head bondable, mixed with a heat bondable color. They are much richer colors and are a little shinier than the regular straight cut.