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Table 1 Sample names, treatment, additives listed in treatment records and surface pH values

From: Comparative chemical investigations of alum treated archaeological wood from various museum collections

Collection Sample Wood typec Sampled area Treatment/additives noted in laboratory reports pHa
Dejbjerg, (D) treated in 1883, National Museum of Denmark, Copenhagen (Denmark) D-A1624 Diffuse porous HW Outer Alum 3.0
D-B1624 Ring porous HW Outer Alum 2.0
D-C1628 Diffuse porous HW Outer Alum 3.0
D-D1626-A Ring porous HW Inner core Alum 3.5
D-D1626-B Ring porous HW Outer Alum 3.5
D-E1622-A Ring porous HW Inner core Alum 3.5
D-E1622-B Ring porous HW Outer Alum 4.0
D-F1629 Diffuse porous Outer Alum 3.5
Oseberg (N) treated between 1904 and 1913 Museum of Cultural History, Oslo (Norway) N-187D HW Dark part Alum 1.5
N-187L HW Light part Alum 1.5
N-207-A Diffuse porous HW Inner core Alum, linseed oil 2.5
N-207-B Diffuse porous HW Outer Alum, linseed oil 2.5
N-250F Diffuse porous HW Middle Alum 1.5
N-250K Diffuse porous HW Inner alum-poor Alum 2.5
Glimmingehus (S) treated in 1936 Swedish History Museum, (Sweden) S-5T HW Outer Alum, linseed oil 3.0
S-125h HW Outer Alum, retreated with PEGb 4.5
S-125k HW Outer Alum 3.5
S-346 HW Outer Alum, glycerol, linseed oil retreated with PEGb 4.5
S-346d SW Outer Alum 2.5
S-346e SW Outer Alum 2.5
S-383 HW Outer Alum, linseed oil, glycerol 1.5
S-383c HW Outer Alum, linseed oil, glycerol 1.5
Reference archaeological Head post N-124 Maple Inner core Untreated
Finest sled pull N-17 Maple Inner core Untreated
Arch pine Pine Inner core Untreated
Reference fresh undegraded Ref. maple Maple   Untreated
Ref. birch Birch   Untreated
Ref. pine Pine   Untreated
  1. aSurface pH measurements were taken directly on object surfaces by applying damp pH strips. pH of reference sound maple is 5.5. pH for samples head post N-124 and finest sled pull N-17 was not measured
  2. bSamples were re-treated with PEG 2000 between 2005 and 2009
  3. cThe wood genus is included only when it is confirmed by light microscopy. Hard wood is abbreviated as HW. Softwood is abbreviated as SW