Fluor shades viewed under long wave light.
DP numbers are the copyright of the MBPC and are used with their permission.

ACP = Advanced coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
OFNP = Optical free non phosphorised paper PVA = Polyvinyl alcohol acetate gum
!

Stamps printed Litho

nd67_68

ND67 - Northern Ireland 20p black, ACP/PVAD (White) (Questa/litho) - Deegam N200.1.1 - S.G specialised XNL32 - Stoneham U68 - Concise NI51

ACP from cylinders Q1Q1, Q2Q2, Q3Q3, Q4Q4 [28.11.89]

ND68 - Northern Ireland 20p black, ACP (Low OBA)/PVAD (White) (Questa/litho) - Deegam N200.1.1a - Stoneham U68a

Low OBA paper from cylinders Q3Q3, Q4Q4 [6.90]
bs20e

BN20E - Northern Ireland 20p light green, OFNP/PVA, 4.75mm blue fluor band right of centre CB (OR) (Cyls Q1, Q2) (Questa/litho) - Deegam N200.2.1 - S.G specialised XNL33 - Stoneham SLU95 - Concise NI71

4.75mm blue fluor band right of centre from cylinders Q1, Q2 [25.7.96]
pn20e

Stamps printed Gravure

PN20E - Northern Ireland 20p light green, OFNP/PVA, 4.5mm Novaglo dull blue fluor band right of centre CB (OR), inverted print (Cyl W1) (Walsall/gravure) - Deegam N200.3.1 - S.G specialised XN46 - Stoneham SLU101 - Concise NI79

APS perforation, 4.5mm dull fluor band from cylinder W1 [1.7.97]

PN20c - Northern Ireland 20p light green, OFNP/PVA, 4.5mm Novaglo bright blue fluor band right of centre CB (OR), COMB perforation, inverted print (Cyl W1) (Walsall/gravure) - Deegam N200.3.1a

Comb perforation, 4.5mm bright fluor band from cylinder W1 [20.10.97]

PN20a - Northern Ireland 20p light green, OFNP/PVA, 4.5mm Novaglo bright blue fluor band right of centre CB (OR), APS perforation, inverted print (Cyl W1) (Walsall/gravure)

APS perforation, 4.5mm bright fluor band from cylinder W1
pn20r

PN20r - Northern Ireland 20p light green, OFNP/PVA, 4.5mm Novaglo blue fluor right band (DP269) (Walsall/gravure) - Deegam N200.4.1 - S.G specialised XN47 - Stoneham SLU102 - Concise NI80

Novaglo blue fluor right band from Speed prestige pane DP269 [13.10.98]