SPI Supplies Carbon Fiber (Thick) 1.3 mm Diameter x 1 m Long

Smaller thin thread (a new product)
We have for a number of years offered our thin carbon thread but some users found that they needed to have an even thinner coating. The density is 0.4g/meter and a nominal diameter of 0.8 mm. So we have introduced this fiber for those wanting a thicker coating than would otherwise be possible with the thin carbon thread (see below).

We find that there is a range of preferences depending on the specifics of the samples being coated, the details of the operation of specific carbon coaters, and therefore many laboratories tend to keep at least a few packs of all of the different carbon fiber diameters. For most carbon coaters, and many users, it is difficult to control the thickness (relative to a vacuum evaporator) and by selecting more carefully and precisely the diameter/density of the fiber, one can obtain much more highly reproducible coating thicknesses.

But one should pay attention to the recommendation of the manufacturer of their units and at least use that recommended diameter of fiber as a starting point from which one can use either a thicker or thinner fiber.

This carbon fiber is recommended for those coating flat surfaces and desiring less thickness of the coating. This is also the recommended fiber thickness and structure recommended for use in the Leybold Vacuum Products Inc. Coating System Model ScanCoate 6.