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Table 1 Description of alum-treated wood samples from the Oseberg collection. Wood type given where identified (the objects were too degraded to identify the genus)

From: Ammonium alum in alum-treated wooden artefacts: discovery, origins and consequences

Sample prefix Description Wood type
185 Samples from fragments from object 185, a loom. Fragments do not contain linseed oil or varnish, and have been sampled from the alum-rich layer. The fragments labelled 185-1 to 6, which originally fit together, are in increasing state of visual deterioration with increasing suffix number Diffuse porous
229 Samples from fragments from object 229, a simple sled, without linseed oil or varnish. The fragments 5, 1B, 1C, 1D had distinct alum-rich and alum-poor areas, and were sampled from the “alum rich” (AR) part (close to the surface) Diffuse porous
203 Samples from fragments from object group 203, pointed sticks for tents or horse tether
206 Samples from fragments of object group 206, from a stretcher
207 Sample from fragment from object 207, a large baking trough, that were not used in its reconstruction. Linseed oil coated. Previously cut up for analysis at different depths, and powdery residue was reserved for further study Diffuse porous
210 Samples from object 210, which consists of fragments of an unreconstructed large barrel or vat, wooden parts of which have been treated with alum and thoroughly impregnated with linseed oil Ring porous
250 Sample from fragment of object 250, a reconstructed carved board coated with linseed oil and varnish. Fragment 2 was from a broken off piece, sampled from inside to avoid contamination with linseed oil Diffuse porous
275 Samples from fragments of object 275, a chest
279 Assorted fragments from different objects: coffin, nail, casket, plate, loom
296 Samples of fragments from unknown object 296
410 Samples from fragments of object 410, a bed