All archival and master negatives are indeed restricted and not for public use. However, the Library has positive copies of most negatives, and those are available to the public and also eligible for Interlibrary Loan with other institutions. The OskiCat record for Guatemala tidings
, for example, shows the Library has two generations of negative film (with the status ASK REFERENCE, i.e., restricted) and also a positive service copy covering the same date range and having call number NEWSFILM-1 (with the status AVAILABLE).
But the Library also holds a large number of negatives for California newspapers with no positive copies. Even though OskiCat has records for these newspapers the negatives belong to UC Riverside and UC Berkeley doesn't hold matching positives (they are held by California State Library). As a good example, refer to the OskiCat record for Fall River Tidings
: it says that the Library has a Bancroft negative BANC NMP 8064:17, the matching positive copy of which is available in Doe Library's Newspapers & Microforms as MICROFILM 78779; and two CNP negatives with call number 01-168 and with no matching positive. To get a hold of a positive film copy of the latter, contact CSL or CNP Microfilm Archive at http://cnma.ucr.edu/.