Hi Connie,
We used shield pack sleeves for quite some time, but they are no longer being made.
We have started using the sleeves from Kurt Nauck on the theory that all modern papers are very low acid already when compared to paper made 10 or more years ago. The stock is very stout and provides a high level of protection for both shellac and acetate discs.
c/o Nauck's Vintage Records 22004 Sherrod Ln. Spring, TX 77389
Website: www.78rpm.com E-Mail: nauck@xxxxxxxxx
Phone: (281) 288-7826 Fax: (425) 930-6862