Add to Cart Compare Quick view So Silk Papers #10 Peel and Seal Envelopes, 500 for $198, 92lb Cover C1S, Black Print, MSRP: Now: $198.00 Was: So...Silk Peel and Seal envelopes are finally available. Please ask about matching letterhead, different stock colors or other types of envelopes.SO...SILK papers come in 8 colors with an iridescent visual effect, a smooth finish and weights from 88 lb... MSRP: Now: $198.00 Was: Add to Cart Compare Quick view