A mainly brown hand-moulded brick
Nitro is a hand-moulded facing brick from the Obscuro range of Nelissen Brickworks. This brick is made from Löss from Limburg. The facing brick is extracted from the plateau of Kesselt in the Meuse valley. Then it gets upgraded with raw materials from the Volcanic Eifel. The non-perforated hand-moulded facing brick is sanded on five sides. The Nitro hand-moulded bricks are provided with an oblong sloping groove on one flat side (frog, group 1).
The structure of the Nitro is characterized with a rough appearance with fine and irregular grooves in the sandy surface. The baking process of this brick is done in a gas-fired tunnel kiln under a slightly reducing atmosphere. By the homogeneous mixture of manganese dioxide with grey-red baking Löss loam, Nelissen Brickworks obtains a purple-brown to orange-brown brick with blue shades.