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Phosphorised bands on Machin stamps

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  • xtf70
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    • Created on Oct 29, 2010 at 3:44 AM
    • #302579
    Hold the stamp up to a good light source so the light reflects off the stamp at about 5 degrees - you should see the phosphor bands as one or two dull strips against the shinier ink surface

    This is a rough-and-ready method and works better with some phospor/ink combinations than others, also some bands are more pronounced than others, especially if the stamp has been used and soaked off paper
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    Hold the stamp up to a good light source so the light reflects off the stamp at about 5 degrees - you should see the phosphor bands as one or two dull strips against the shinier ink surface

    This is a rough-and-ready method and works better with some phospor/ink combinations than others, also some bands are more pronounced than others, especially if the stamp has been used and soaked off paper
    • Created on Oct 29, 2010 at 4:18 AM
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    • Created on Oct 29, 2010 at 4:40 AM
    • #302588
    It could be the phosphor used in the bands reacts to a different UV wavelength from the phosphorised paper

    Have you tried switching between long wave and short wave?
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    It could be the phosphor used in the bands reacts to a different UV wavelength from the phosphorised paper

    Have you tried switching between long wave and short wave?
    • Created on Oct 29, 2010 at 4:45 AM
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    • Created on Oct 29, 2010 at 12:49 PM
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    • Created on Dec 30, 2010 at 8:17 AM
    • #312212
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    • Created on Dec 30, 2010 at 9:01 AM
    • #312218
    Machin stamps were introduced in 1967 and based on a plaster bas-relief by Arnold Machin, hence the term 'Machin heads'

    Prior to this stamps used a portrait by photographer Dorothy Wilding, and are generally referred to as 'Wildings'
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    Machin stamps were introduced in 1967 and based on a plaster bas-relief by Arnold Machin, hence the term 'Machin heads'

    Prior to this stamps used a portrait by photographer Dorothy Wilding, and are generally referred to as 'Wildings'
    • Created on Dec 30, 2010 at 9:21 AM
    • #312223
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