Hatchfield, 2014: MINIMIZING DAMAGE IN STORAGE AND DISPLAY
Table 5: Acceptability of plastics
Acceptable
Less Stable
Unsuitable
Teflon®
Cellulose acetate
Cellulose nitrate
Polyethylene
Polyurethane foams (ester better than ether,
but both unsuitable for long-term proximity)
Tyvek® spunbonded polyethylene non-
corona treated, soft drape (wash first)
Polyvinyl chloride (PVC)
Polypropylene
Any highly plasticized or chlorinated plastic
Polyethylene terephthalate (MylarD®)
Sulfur vulcanized rubber
Acrylics
Polystyrene (not a vapor-barrier)
Polycarbonate (not a vapor-barrier)
Polyester
Nylon
Table 6: Acceptability of adhesives
Acceptable
Less Stable
Unsuitable
Acrylic adhesives (pressure-sensitive
Some hot melt adhesives based
not in direct contact)
on ethylene vinyl acetate
Urea-formaldehyde
Some hot melt adhesives based on
polyethylene/polypropylene
Polyvinyl acetate-based caulk
Animal glue (sulfur)
Acrylic emulsion or dispersion
adhesives
EPDM
Polyvinyl acetate (PVA or PVAc)
emulsion adhesive
Acrylic caulk
Pressure-sensitive adhesives
(contact)
Rubber cement
Table 7: Acceptability of caulking and gasketing materials
ACCEPTABLE
L
ESS STABLE
U
NSUITABLE
Ethylene-propylene-diene monomer
Neutral cure silicone caulk
(EPDM - note that some are
Sulfur-containing rubber
vulcanized with sulfur)
Polyethylene foam
Polyurethane
Silicone foam (extruded)
Oil-based glazing compounds
Teflon®
Polyvinyl acetate-based caulk
Acrylic caulk
Tygon® tubing (PVC)
Table 8: Acceptability of coatings, stains, paints and varnishes
Acceptable
Less Stable
Unsuitable
Acrylic paints
Shellac (prolonged solvent
retention)
Oil-based paints and coatings
Some water borne polyurethanes
Some polyurethane resins
Alkyd resin paints
Polyvinyl acetate (PVA or
PVAc) emulsion paints
Urea resin
98
Journal of Paleontological Techniques