Paper varieties viewed under long wave light.
PDP numbers are the copyright of the MBPC and are used with their permission.
BCP = Bluish coated paper PVA = Polyvinyl alcohol acetate gum
OCP = Original coated paper
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P4 or P4mp - 1d BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head A1, upright print (Cyl 2) - Concise 724
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P4 Two 4.75mm B3 phosphor bands, head A1 from sheets cylinder 2 [5.2.68] - Deegam PD 2.1.1 - S.G specialised U2 - Stoneham M14
P4mp Phosphor omitted - Deegam PD 2.1.1a - S.G specialised U2c - Stoneham M14a

P8 - 1d BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Vertical coil) - Deegam PD 2.1.2 - Stoneham M15b
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Two 4.75mm screen 150 B3 phosphor bands, head B2 from vertical coil [11.6.68]

P12 or P13 - 1d BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2 (PDP2) - Stoneham M15c
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P12 Upright print, head B2 from booklet pane PDP2 [25.3.68] - Deegam PD 2.1.3
P13 Inverted print - Deegam PD 2.1.4

P7 or P7mp - 1d BCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Cyl 4) - Deegam PD 2.1.5 - Stoneham M15
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P7 Two 4.75mm screen 150 B3 phosphor bands, head B2 from sheets cylinder 4 [?.10.68]
P7mp Phosphor omitted, head B2 from sheets cylinder 4 [?.10.68] - Deegam PD 2.1.5a - Stoneham M15d

P8a - 1d OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Vertical coil)
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Two 4.75mm screen 150 B3 phosphor bands, head B2 from vertical coil [11.6.68]

P12a or P13a - 1d OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (PDP2)
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P12a Upright print, head B2 from booklet pane PDP2 [25.3.68]
P13a Inverted print

P9 - 1d OCP/PVA, two 4.75mm screen 150 B3 phosphor bands, head B2, upright print (Cyl 6)
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Two 4.75mm B3 phosphor bands, head B2 from sheets cylinder 6 [?.6.69]

P16 or P18 - 1d BCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2, sideways print (PDP4/A) - Stoneham M16
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P16 Sideways print right, head B2 from booklet panes PDP4/4A [6.4.68] - Deegam PD 2.2.1
P18 Sideways print left - Deegam PD 2.2.2

P14, P14mp or P15 - 1d OCP/PVA, two 4.75mm screen 250 B3 phosphor bands, head B2 (PDP10, 15) - Deegam PD 2.2.3
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P14 Upright print, two 4.75mm B3 phosphor bands from booklet panes PDP10 [6.1.69] - PDP15 [1.12.69]
P14mp Upright print phosphor omitted - Deegam PD 2.2.3a
P15 Inverted print, two 4.75mm B3 phosphor bands - Deegam PD 2.2.4

P22 or P23 - 1d BCP/PVA, 4mm screen 250 B3 phosphor centre band, head B2, upright print (PDP7) - S.G specialised U3 - Stoneham M17 - Concise 725
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P22 Upright print from booklet pane PDP7 [16.9.68] - Deegam PD 2.3.1
P23 Inverted print - Deegam PD 2.3.2

P24 - 1d OCP/Arabic, 4mm screen 250 B3 phosphor centre band, head B2, sideways print left (Multivalue coil) - Deegam PD 2.4.1 - S.G specialised U4 - Stoneham M1 - Concise 725Eg
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4mm B3 phosphor centre band, head B2 from GS/GL coils [27.8.69]