1 Wipe away the first drop of blood with a piece of clean, dry cotton gauze. 2  Since newborns do not often bleed immediately, use gentle pressure to produce a rounded drop of blood. 3  Do not use excessive pressure because the blood may become diluted with tissue fluid. 4  Fill the required microtainer(s) as needed.
You'll likely see labels like THHN or THWN written on the wire. For example, THHN wire stands for thermoplastic high heat-resistant nylon coated wire. THWN stands for thermoplastic heat- and moisture-resistant nylon coated wire. As you can see, these wires are built to take on many different conditions.
Both THHN and TFFN wires are used as general purpose wiring, for appliances, machine tools and control circuit wiring. Although only TFFN 18 1 can be used as a dog fence wire. THHN is not ideal to be directly buried underground. TFFN is used on 16 and 18 AWG size only.