Blackfast 181 Chemical Blackingl 5 Litre size.
Blackfast 181 will chemically black cast iron and steels containing 12% chromium or less at room temperature (16-20 degrees C).
In use dilute with 75% water
Diluted for use
Instructions and safety data sheets supplied.
Blackfast 181 will chemically black cast iron and steels containing 12%
chromium or less at room temperature (20ºC). Blacking performance may be
adversely affected by temperatures lower than 16ºC. Preparation of the surface
of the item to be blacked is carried out using one or more steps involving
degreasing, pickling and conditioning using the appropriate Blackfast products
with intermediate flowing water rinses. Once the surface is chemically clean and,
if necessary, conditioned, the item is immersed in the Blackfast solution for
1 minute.
Components are normally jigged or barrelled with agitation if necessary to ensure
all parts of the metal surface are in contact with the liquid. Following blacking,
the item is rinsed in a flowing water bath and finally dipped in a dewatering oil
such as Blackfast 825, 833 or 841 depending on the type of finish required. Thus
a typical blacking line can involve 7 tanks (degreasing - rinse - conditioning -
rinse - blacking - rinse - oiling).