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Black Lustre – Blackening Salts for Mild Steel


Available in 25kg double lined UN bags, Prices include delivery to England & Wales.

Please note we only ship to commercial addresses.


“Black Lustre” salts is a free flowing caustic alkaline powder capable of producing a premium quality
black oxide finish on mild steel by the conversion of the surface to Fe3 O4. “Black Lustre” salts produces
a highly decorative and durable black finish which offers no dimensional change.

“Black Lustre” salts find many applications across a wide range of industries including machine tool,
armament and precision instrument manufacturers. Rutpen are the sole manufacturers of the “Black
Lustre” salts which are supplied in 25 kilo UN double lined bags.

“Black Lustre” salts are used in a high temperature immersion process, therefore extreme care is to be
taken during the handling and operation of this product.

Safety Data Sheet

Just Some Of Our Trusted Customers

Our skills are right across our core areas of Contract Manufacturing, Toll Blending and Solvent Recycling, including: technical, manufacturing, warehousing and logistics. This is all underpinned with a strong belief in quality management, great service, the importance of confidentiality and a genuine care for our impact on the environment.

“Following a factory fire, the original client needed a new manufacturing plant – and fast – for the manufacture of domestic / retail wood treatment products. This emergency response was a complex project due to the low flashpoint of the products and the need to produce a retail-quality product.”
“An existing client wanted to upgrade one of their UK based facilities that provided chemicals in bulk for the food and brewing sectors, but needed to continue servicing their clients while the engineering work was underway.”
“The client is a manufacturer of silicone base ingredients for use in cosmetics and industrial applications, but its headquarters are not based in the UK and its UK plant is not conducive to the manufacture of highly flammable materials.”
“The client prints designs on t-shirts and uses a liquid conditioner to cure inks within the printing process. The original supplier of the conditioner (and manufacturer of the equipment) was overseas and the local agent ceased supply to the UK, resulting in a cost and continuity issue, so the brief from the client was to develop an alternative liquid”