EA9

    pH Testing Pen

    Rf. 100090
    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.

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    With this pH testing pen it is easy to determine if a paper or board is acidic. A simple method to distinguish between a safe (neutral or alkaline) and an acid material. Easy to use, simply draw a small line on the material you wish to test. The chlorophenol red indicator solution in the pen will turn purple on any paper with a pH of 6.8 and above. A clear or yellow color indicates the material is probably unsuitable for conservation purposes. 
    Note: Unreliable results may occur on colored or coated papers.

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