These envelopes are glued with specially formulated neutral conservation adhesive Evacon-RTM on two sides. With non-adhesive flap, without thumb notch.
Material: Heritage Archival pHotokraftTM buffered paper | Canson® Barrier paper
Opening (side): short
Colour: White
Weight: 80 | 120 g/m2
Specifications: Heritage Archival pHotokraft TM buffered paper
- Alpha Cellulose above 87%
- High percentage Long Kraft fibres
- pH 7.5 - 9.5
- Buffered (average 3%) calcium carbonate (ISO 9706:2004)
- Acid-free
- Neutral AKD internal sizing
- External Tub sized / Starch
- Lignin-free
- O.B.A.'s free (optical brightening agents)
- Reducible Sulphur less than 0.8 parts per million (0,0008%) (TAPPI T406)
- P.A.T. Photographic Activity Test (ANSI ISO 18916)
- Silver Tarnish Test (ASTM D2043)
- Lightfast and bleed proof pigments (BS1006:97 & TAPPI T475)
- Long Life ISO 9706 (Permanence Test)
Specifications: Canson® Barrier paper
- 100% Cellulose
- 70% short fibres, 30% long fibres
- pH 7.5 - 10
- Buffered (average 2%) calcium carbonate
- Acid-free
- Neutral sizing
- 100% bleached chemical pulp
- Nonblocking optical
- Molds and cryptogamic treatment
- P.A.T. Photographic Activity Test
- Long Life ISO 9706 (Permanence Test)