PPP/PVAD - PCP/PVAD

PPP = Phosphor printed over paper

 PVAD = Polyvinyl alcohol acetate dextrin gum
PCP1 = Phosphorised coated paper (Matt)  

PCP2 = Phosphorised coated paper (Glossy)
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PPP1 - 1p Crimson, PPP/PVAD, upright print (Cyl 12) (Harrison/photo) (Harrison/photo) - Deegam 10.11.1 - S.G. specialised U62 - Stoneham M294 - Concise X846
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Phosphor printed over paper (PPP) from cylinder 12 [10.10.79]

PC8a, PC9a, PC14 or PC16 - 1p crimson, PCP/PVAD, low set value, upright print (Cyl 12) (Harrison/photo)
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PC9a PCP1, Kampf perforation [12.12.79] - Deegam 10.12.1 - Stoneham M301
PC14 PCP2, Kampf perforation - Deegam 10.12.1a - Stoneham M347
PC8a PCP1, APS perforation [?.4.82] - Deegam 10.12.1b
PC16 PCP2, APS perforation - Deegam 10.12.1c

PC9, PC10 or PC17 - 1p crimson, PCP/PVAD, high set value, upright print (Cyl 14) (Harrison/photo)
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PC9 PCP1, Kampf perforation  [?.1.82] - Deegam 10.12.2 - Stoneham M302
PC10 PCP1, APS perforation [?.6.82] - Deegam 10.12.2a
PC17 PCP2, KAMPF perforation [?.7.82] - Deegam 10.12.2b

PC13, PC13a or PC13ls - 1p Pale crimson, PCP1/PVAD, screened value, sideways print left (RD3 coil) (Harrison/photo)
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PC13a Non screened value from RD3 multivalue coil [14.8.84] - Deegam 10.12.3
PC13 Heavily screened value - Deegam 10.12.3a - Stoneham M302a
PC13ls Lightly screened value