KOLD-BLAK INDIA is proud to represent the manufacturer, BLACKFAST CHEMICALS LTD.., UK as the INDIA Distributor for Room Temperature Blacking Products.
The Blackfast Process has been the industry leader of conversion blacking in India for over 6 years and has been distributed through out the world for over 25 years.
This blacking & corrosion inhibiting procedure is used in the manufacture of machine tools, tool holders, cutters, industrial machinery, Auto component manufacturers and precision metal components.( Include customers like Sandvik, Seco, Kennametal )
Kold Blak is a specialist finish for colouring iron and steel components black. It is a safe and easy-to-use chemical immersion process operated at room temperature. The product’s unique quality is that the finish does not result in an alteration to the dimension of the component. Any manufacturer of precision engineered components requiring a decorative finish is a potential customer.
Kold Blak will darken bright brass surfaces to a dark brown. The bath should be maintained at a temperature range 35-40ºC for the best results. At lower temperatures, the process is slower and the recommended immersion time of 5 minutes is exceeded.
Hardness is a major contributor to hydrogen embrittlement. Harder, stronger materials are more susceptible to failure than weaker, softer ones. In general, if the hardness of the component is less than 35 HRC, there will probably be little difficulty with hydrogen embrittlement. However, if the component has hardness above 40 HRC, problems are more likely to occur.