Fiber-base paper

Fiber-Base Paper: Photographic paper consisting of light sensitive emulsion coated on a durable paper base. See also "silver prints." ...

Try to find a local lab where you can sit down and talk to the printer or at least drop by every day and look at work prints, circling problem areas with a grease pencil. A good B&W printer should be able to make archival prints on fiber-base paper ...

See also: Hood, Coated, Back, Near, Transparencies