These off-white envelopes are crafted from purified alpha cellulose fiber, free of lignin, and buffered with 3% calcium carbonate to maintain a pH of 8.5. They feature a starch-based archival adhesive and a design with narrow, rounded corner side seams, plus a 2-inch (51mm) non-adhesive flap with rounded corners on the short side for enhanced protection. Each pack contains 50 envelopes.
