BE3

    Concertina

    Rf. 400521
    Format Guide
    DIN and folio paper formats
    A5 210 × 148.5 mm
    A4 297 × 210 mm
    Folio 315 × 215 mm
    Extended Folio 346 × 248 mm
    A3 420 × 297 mm
    A2 594 × 420 mm
    A1 841 × 594 mm
    A0 841 × 1189 mm
    Photography formats
    P1 203 × 254 mm
    P2 254 × 305 mm
    P3 305 × 406 mm
    PX 356 × 279 mm
    P4 406 × 508 mm
    P5 508 × 610 mm
    Glass plate formats
    P0 127 × 178 mm
    PZ 254 × 178 mm

    How to measure

    The measurements are placed in order of length x width (or depth) and height. (LxWxH)

    For a 2-dimensional object, such as a painting or a sheet of paper, the measurements are placed in the order of length and width. 

    For example, if a painting measures 70 cm long and 50 cm wide, it would be written as 70 x 50 cm. (LxW)

    Box measurements:

    The Internal Measurements of the box are the useful size of the box. That is, the measures that you can take advantage of for storage.

    The External Measurements are when the box is completely closed.

    Material
    Measures B Folders (LxW)
    Weight
    Pack
    Quantity
      Available

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    Concertina envelope, system for the storage of 35, 60 and 70 mm photographic negatives. Single piece die-cut with creases to form 6 pockets.
    For the long term storage of the most precious and sensitive photographic archive material, where the utmost caution has to be taken against degradation from contact with potentially harmful elements such as adhesives that may, in time, react with the enclosed material.

    Material: DA2 100% cotton paper | DA2 Unbuffered pHotokraft™ Paper

    Colour: White

    Weight: 80 | 90 g/m2
    Pack: 25 units

    Specifications:

    DA2 100% cotton paper

    - 100% cotton fibre

    - pH 6.7
    - Unbuffered
    - Non satin surface to allow maximum transpiration
    - Glue free
    - O.B.A.'s free (optical brightening agents)
    - Reducible sulphur, as S, mg/kg, (ppm) less than 1
    - Low ash content: 0,06%
    - P.A.T. Photographic Activity Test (ANSI ISO 18916)
    - Silver Tarnish Test
    - Long Life ISO 9706 (Permanence Test)


    PAT ANSI ISO 18916 LONG LIFE ISO 9706 1994 UNBUFFERED SIN RESERVA ALCALINA 100% COTTON FIBRES FIBRAS 100% ALGODÓN

    DA2 Unbuffered pHotokraft™ Paper

    - Alpha Cellulose above 87%

    - High percentage Long Kraft fibres

    - pH 6.5 - 8.5

    - Unbuffered

    - 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)


    PAT ANSI ISO 18916 LONG LIFE ISO 9706 1994 UNBUFFERED SIN RESERVA ALCALINA WOOD PULP MADE FABRICADO CON PULPA DE MADERA ACID FREE LIBRE DE ÁCIDOS

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