I have a Labelwriter400. I need to print barcodes that last decades. Can I do so with this unit, or do I need to get something else?
Dymo LabelWriter 400 are thermal printers. This means heat can affect the label media its "written" on. That, plus the material of the labels themselves have their own properties. There are a number of different label media types. I cant say for certain if any will last that long. I would assume they would, as long as they are not exposed to heat, humidity, and intense light.
You should call up Dymo and see if they offer label media that meets your needs.