Hatchfield, 2014: MINIMIZING DAMAGE IN STORAGE AND DISPLAY
caulking
and
all
other
materials
inside
emanation of pollutants from wood products.
exhibition cases should be carefully considered
All sections of the case accessible to the display
before use. Some very brief guidelines are
area must be sealed with Marvelseal® if wood
included here, in addition to a general guide for
products are used.
choosing case materials.
List of currently acceptable materials follow
(Tables 3-11). Although certain classes of
materials can be recommended for use,
GENERAL GUIDELINES
materials should always be tested, because
product formulations can change without
Exhibition cases should be tightly constructed
notice. Where microclimates are required,
to reduce dust infiltration and the effects of
compartments should be built beneath the deck
humidity fluctuation on collections and also so
areas to house conservation materials such as
microclimates differing from ambient conditions
silica gel. Access to those compartments should
may be created where necessary.
be provided from the case exterior so vitrines
Use inert or low reactivity materials whenever
and
displays
are
not
disturbed.
These
possible. These include glass, acrylic sheeting,
compartments should be lined with an
metal, and powder-coated metal. Minimize the
aluminum laminate such as Marvelseal®. Decks
use of wood products in exhibition case
should be pierced with holes or gaps provided
interiors. When wood must be used in a display
around the edges in order to allow air
area, it should be completely sealed with a
circulation
between
conservation
material
vapor barrier such as the aluminum laminate
compartment and the vitrine area.
Marvelseal® or Moistop® to prevent the
Table 3: Acceptability of construction materials
Acceptable
Less Stable
Unsuitable
Glass
Powder-coated metals
Baked enamel metals
Metals including anodized
aluminum, stainless steel,
Most other woods and wood products
(although some can catalyze
Some woods and wood products
including the following:
reactions with pollutants)
including the following:
Oak
-
high
volatile
acidity
Note
Poplar, lauan.
Fir and birch plywoods -moderate
: rust inhibitor coatings on
acidity and should not be considered.
steel may contain sulfur.
Wood when completely wrapped
with aluminum sheeting or
Medite II®
aluminum-polyethylene laminates
Medite
such as Marvelseal®
Particleboards
and
chipboards
Medex®, a formaldehyde-free
High-pressure phenolic laminates
(contain
higher
quantities
of
particleboard is considered safer
such as Formica
adhesives and more surface area of
than other particleboards , but
wood fiber than plywoods and are
still contain volatile acids.
generally more acidic than plywood).
Use only plywood with exterior,
"type
one"
(waterproof,
usually phenol- formaldehyde)
adhesive for pedestals. Medium
Aluminum laminates such as
density overlay (MDO) or high
Alucobond® or Dibond®
density overlay (HDO) are exterior Plywoods with interior grade glues,
plywoods made for signs and depending on the adhesive used.
construction with a paper surface.
These may be used if poplar or
lauan are not available.
Upson
board
is
a
pressed
Tycore® (neutral pH paper
cardboard type product which is Tempered masonite (contain volatile
honeycomb board)
inherently acidic but seems to products)
have low volatile acidity.
Ethafoam® 900
96 Journal of Paleontological Techniques