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

PCP = Phosphor coated paper PVA = Polyvinyl alcohol acetate gum
ACP = Advanced coated paper PVAD = Polyvinyl alcohol acetate dextrin gum
FCP = Fluorescent coated paper  
OFNP = Optical free non phosphorised paper
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sw13

Bluish violet

SW13 - Scotland 18p Bluish violet, PCP/PVAD (Waddington/litho) - Deegam S180.1.1 - S.G specialised XSL21 - Stoneham SC64 - Concise S44

From cylinder 1A1B [8.4.81]
sq14_15

Grey green

SQ14 - Scotland 18p Grey green, ACP/PVAD (Questa/litho) - Deegam S180.2.1 - S.G specialised XSL22 - Stoneham SC95a - Concise S59

From cylinders Q1Q1 to Q8Q8 [6.1.87]

SQ15 - Scotland 18p Grey green, ACP/PVAD (White gum) (Questa/litho) - Deegam S180.3.1 - S.G specialised XSL23 - Stoneham SC95

White gum from cylinders Q5Q5, Q6Q6 [29.3.88]
sq16

Light green - SA phosphor

SQ16 - Scotland18p Light green, FCP/PVA, 4mm SA phosphor bar right of centre, perforation 14.75 X 14 (Questa/litho) - Deegam S180.4.1 - S.G specialised XSL24 - Stoneham SC81 - Concise S60

Perforation 14¾ X 14 from cylinders Q1Q1 to Q12Q12 [3.12.91]

SQ17 - Scotland18p Light green, FCP/PVA, 4mm SA phosphor bar right of centre, perforation 13.75 error (Questa/litho) - Deegam S180.4.2 - S.G specialised XSL25 - Stoneham SC81c - Concise S60a

Perforation 13¾ error from cylinders Q5Q5 to Q10Q10 [26.9.92]

Light green - Yellow fluor

sq18

SQ18 - Scotland 18p Light green, OFNP/PVA, left yellow fluor band (Questa/litho) - Deegam S180.5.1 - S.G specialised XSL26 - Stoneham SC106 - Concise S61

From Beatrix Potter prestige pane DP197 [10.8.93]