October 2026

Quality engineer auditing an investment casting foundry with checklist documents on site Certificates prove a foundry passed an audit once. Records prove what happens on a night shift in August. Investment casting runs across roughly twenty unit operations between wax injection and a packed box, and most quality escapes happen mid-chain where nobody outside the […]

Two lost wax castings compared, one with a smooth silica sol finish and one with a coarser water glass finish Send a drawing to a Chinese lost wax foundry and the first process question back is usually the same: silica sol or water glass? Those names describe the binder that builds the ceramic shell, and