Yellow Hammer Accessories offers Device for Acid Treatment. Yellow Hammer Accessories provides economical solutions to spinning mills, specialising pre-cleaning systems for all modern cards. Acid Treatment device is a labour saving and time consuming equipment for the treatment of cots and rollers. It offers solution to the problem of roller lapping, which causes low productivity, poor yarn quality, increased workload on operatives and wastage of raw material. Treating the roller cot surface with concentrated sulphuric acid helps to reduce lapping tendency drastically.