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Heritage Science

Table 4 Case study object spectral matches for polymer identification

From: Non-invasive identification of polymers in cultural heritage collections: evaluation, optimisation and application of portable FTIR (ATR and external reflectance) spectroscopy to three-dimensional polymer-based objects

Object

Bruker ATR-FTIR Complete Librarya

Hit quality clamped (handheld)

Reference Sheetsb

ATR % match clamped (handheld)

Reference Sheetsb ER % match

Workshop Samplesc

ATR % match clamped, (handheld)

ResinKit™

ATR % match clamped, (handheld)

Literatured

IRUG database ATR

PS Jelly Mould

875 (837)

96.42

(93.72)

92.35

99.24

(98.19)

99.51

(94.25)

A: p.266

B: p.18

ISR00031 ISR00125

PVC Lamp Cable

–

86.13

(79.97)

78.43

88.68

–

89.43

(85.50)

A: p.270

B: p.19

ISR00155 ISR00063

PUR Padding

899 (864)

99.03

(83.10)

93.67

99.08

(95.54)

–

A: p.268

B: p.19

ISR00157

PP Goblet

921 (847)

98.78

(96.58)

71.01

99.66

(97.22)

98.13

(94.15)

A: p.265

B: p.15

ISR00058

PF Ashtray

–

97.24

–

78.09

95.88

–

–

A: p.259

B: p.10

–

PC Flash Screen

868 (905)

99.39

(92.97)

96.25

99.73

(99.37)

99.73

(94.39)

A: p.261

B: p.11

ISR00122

MF Canister Lid

–

99.35

(99.04)

94.85

96.48*UF

(95.06)

–

B: p.8

–

PE Bottle Lid

911 (900)

99.22

(96.20)

73.85

98.15

(97.36)

98.51

(96.60)

A: p.262

B: p.13

ISR00077 ISR00135

ABS Camera Body

770 (795)

81.35

(86.63)

68.31

94.25

(94.88)

94.41

(94.89)

B: p.3

ISR00095

PMMA Knife Handle

909 (866)

99.22

(95.47)

88.49

99.27

(98.67)

98.84

(98.53)

A: p.264

B: p.5

ISR00080 ISR00081

PA Light Meter Screen

884 (876)

94.62

(94.65)

89.96

97.63

(96.65)

97.37

(97.82)

A: p.260

B: p.9

ISR00126 ISR00136

CA Sunglasses

937 (901)

98.35

(98.04)

74.02

NA—mislabeled?

97.06

(93.01)

A: p.256

B: p.6

ISR00154 ISR00064

CSF Buckle

876 (880)

97.56

(97.09)

73.25

98.55

(98.45)

–

B: p.5

–

Polyester Buttons

787 (−)

75.88

(49.02)

21.27

96.05 *GRP

–

–

A: p.263

B: p.8

ISR00145 ISR00158

CN Vanity Box

902 (814)

98.90

(90.03)

92.77

99.37

(98.42)

–

A: p.257

B: p.7

ISR00004 ISR00066

Total positive identifications:

12/15 (11/15)

15/15

(13/15)

14/15

13/15

(11/15)

9/15

(9/15)

A: 12/15

B: 15/15

12/15

  1. aNumber = hit quality out of 1000
  2. bTable 2
  3. cTable 3
  4. dA = Shashoua [32] (absorbance); B = Saviello et al. [15] (absorbance and reflectance)
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