Die marks in sheet metal bending occur because tooling used in press brakes often leaves a surface mark.
These marks are called die lines or witness marks, and while difficult to prevent, there are a few things you can do to minimize, hide, or eliminate unwanted markings on your parts.
SendCutSend does not offer die protection or mark removal. To minimize the effect the tooling has on your part, choose a harder material like stainless steel. Witness marks on stainless steel won’t be as deep as on softer materials, and can be more easily removed or hidden. To blend out the marks on your part, a dual action (DA) orbital sander works best.
Review our bending guidelines before you start designing your part for our online bending service! When your file is ready, upload it to our website for an instant quote!
