Primacord

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Primacord is a registered trademark of detonating cord used in blasting, originally manufactured by the Ensign-Bickford Company of Utah. Ensign Bickford sold the trademark to Dyno Nobel Inc in 2003 and it is now manufactured in Graham, Kentucky. Primacord consists of a core of pure powdered PETN in an outer textile jacket (sometimes waxed), and is produced in 8 strengths:

Name Loading g/m (gr/ft) Colour
Primacord 1 1.5 (7.5) Yellow
Primacord 2 2.1 (10) Orange
Primacord 3 3.2 (15) Red
Primacord 4Y 3.6 (18) Yellow
Primacord 4R 3.6 (18) Red
Primacord 5 5.3 (25) Red
Primacord 8 8.6 (40) Red
Primacord 10 10.6 (50) Yellow

Primaline is a related product differing principally in having a plastic jacket instead of textile. Primaline is also available in higher loadings, up to 85 g/m (400 gr/ft):

Name Loading g/m (gr/ft) Colour
Primaline 4D 3.6 (18) Orange
Primaline 4HS 3.6 (18) Clear with blue stripe
Primaline 5 5.3 (25) Orange with wax coating
Primaline 5D 5.3 (25) Orange
Primaline 5NF 5.3 (25) Yellow
Primaline 8D 8.6 (40) Orange
Primaline 8HS 8.6 (40) Clear with black stripe
Primaline 10HS 10.6 (50) Clear with red stripe
Primaline 21 21.3 (100) Clear
Primaline 32 31.9 (150) Clear
Primaline 42 42.5 (200) Clear
Primaline 85 85 (400) Light green

"Primacord" is frequently used as if it was a synonym for any detonating cord; c.f. genericized trademark.