Replenishing Bentonite in Green Sand? When? How much?

Discussion in 'Sand Casting' started by Melterskelter, May 14, 2018.

  1. Melterskelter

    Melterskelter Silver Banner Member

    What method or guidelines do casters use to determine when to replenish bentonite in green sand? I am casting iron and iron is reputedly wearing on green sand due to relatively high casting temperatures. How to know when and how much bentonite to add back?
     

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