2nd class blue ... no code var

these are dry prints - Iriodin cylinder not inked
first  reprted in 2009, they can be sourced by comparing the value settings
genuine and forgeries exist ...

n.b. - images must be digital, scanners do not see iriodin layer

ex  genuine booklet

photo: parsons-MBPC

welcome ...

collectors can join the facebook group linked ... more information is posted.


the Mt Pleasant forgery ... reviewed

this is current royal mail red  M14L forgery.  
I have had queries from collectors, who are puzzled by what they see ...

LWUV : flour purple /w white bands
cameo speckled

since  my 9/15/15 post, 2 new vars have been uncovered in the MBPC journal 45-5
var2 - fishscale head - manchester red
var3 - head lettering multiplied, diadem irregular , brite blue flour bands

white head, 14 offset

the forgers are now producing varied printings of same codes


security inks ...

machins have been printed with many different inks, and papers.  special pigments : Iriodin and rhodamine are examples ...

UV Fluorescent
These inks are normally invisible as printed but fluoresce under UV light. There are two types; single long wavelength (360 nm) and dual which fluoresces one color under short wavelength UVa (250 nm) and a different color under log wavelength UVc (360 nm). Typical UV fluorescent color inks include yellow, green, blue, orange, and red. These inks are often used in banknote printing. This ink is available for wet or dry offset, flexographic and gravure printing.

UV Phosphorescent inks also are used in different colors as modern presses operate at higher speeds, quality control is moderated by UV-curing process.   machins are 3 cylinder process - value / phosphor / iriodin layers ...

modern machin presses are using a variety of pigments and flourescent or  phosphorescent inks ...  the counterfeit machins exhibit their own group of flourescent pigments and inks.

in exploring our collections, we reveal some unusual UVa or UVc reactions on genuine and forgery items ...

LuminoChem  shows many inks under 258/365/980 nm lite sources.   raman spectroscopy uses varied light colors in analysis.   interesting addition to collecting experience.

luminescence ...

Douglas Myall describes printer inks as flour-phosphor ... Royal Mail has a standard for value inks, but not for tagging inks.  Phosphor triggers the SWUV Royal Mail scanners - but no afterglow on forgeries...

"there is no fixed standard for fluorescence, `as it is used for security and quality assurance purposes only and does not have to follow strict operational facing requirements"  - Dr. A. R. Lane, the British Philatelic Bulletin,

multi-printings can show shades of value ink, and or shades of flour-phosphor inks.

13T Willenhall red forgery ...

Gerard Small offers a comparison of 2 versions of this forgery ... reported in MBPC 44-5 2015.4

serif 1

  • same Iriodin overlay applied
  • c2 SWUV images 

click to enlarge


14T Manchester red forgery ...

LWUV                                                                     SWUV

 reported in MBPC Bookmark Journal 45-4  photos (G.Small)


12T Mount Pleasant blue forgery ...

 lwuv                                                                 swuv       
12TF - Mount Pleasant blue

 reported in MBPC Bookmark Journal 45-4  photos (G.Small)
the article shows a partial booklet of 12 - 2 vars are shown here

offset BL - pointed perfs

T12 2nd missing flour-phosphors

consider the sets below independently...
the first was discovered by an associate as no phosphor var

 some of images were very difficult to capture


5p A15 partial SBB

phosphor error BL


1st amethyst-purple ... a review

as 2015 draws to a close, several vars are known. 
 the mixed B6 offers a SBB and SBB inset L

D1 counter sheet - note value setting
the first release was reported 2015.08.17  Mount Pleasant -
shortages of 1st royal mail red

MS offers 3 vars.
no kiloware has surfaced.  no forgery known ...

1st silver forgery - die-cut var

dry print


1st silver forgery find ...  note die-cut and "black dot in hair"  HB4 C4-27-8 shows TTTT var with same dot ... so 2 versions exist  under uv-lamp the bars diffuse ...


1st red wembley forgery ...

var - wembley F /w serif 1 in BL ... does anyone have a B12 ? I would like to know position of this one ??


1994 2nd class forgery ... inverted

inverted ellipses, and apparent double impression
3D effect


2nd Large errors ... Iriodin missing

80% of Iriodin overlay is missing

damaged areas are visible in overlay


3.5P dry print error ...

unusual as it only appears on upper 1/3 of machin
R image is LWUV inverted


cylinder sequencing ... dull and bright phosphors

Q. printers are varying, the sequencing cylinder?
I have tried to rationalize dull and bright phosphors

as PUI , phosphor under ink

IUP ,   Iriodin® under phosphor


A15 £2.25 + 3 new var ...

I have found many vars in 2009 2015 HV machins...
2B I1 2B I2 and this new compund var ...

inspect your holdings...


new SBT vars ...