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Series editors' preface - Wood Tools

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178 Conservation of Furniture<br />

Table 4.3 Continued<br />

Class Family/ Genus and species Common name Notes<br />

(subfamily) (spp. = various<br />

species)<br />

Fossil resin<br />

Polyisoprenoids<br />

Insect resin<br />

Miscellaneous<br />

resins<br />

Anacardiaceae<br />

Burseraceae<br />

Euphorbiaceae<br />

Pistacia spp.<br />

principally P.<br />

lentiscus<br />

Various genera<br />

including: Carium,<br />

Bursera, Ayris,<br />

Protium have been<br />

called elemi. Now<br />

restricted to<br />

Canarium<br />

luzonicum<br />

Many different<br />

plants. Hevea<br />

brasilensis is very<br />

important<br />

Laccifer lacca<br />

Styrax spp.;<br />

Benzoin spp.<br />

Calamus draco<br />

Mastic<br />

Elemis<br />

Amber<br />

Natural rubber<br />

Shellac<br />

Benzoin<br />

Dragon’s blood<br />

from Malaya and Indonesia and<br />

were first used as varnish resins in<br />

the second quarter of the nineteenth<br />

century<br />

Mastic has similar properties to<br />

dammar producing a light coloured<br />

glossy and elastic varnish that<br />

becomes somewhat yellow, brittle<br />

and fissured with age and blooms<br />

readily in moist atmospheres.<br />

Known from antiquity and may<br />

have been used as a varnish from<br />

the ninth century. Dissolves readily<br />

in oil of turpentine, aromatic<br />

hydrocarbons and alcohol but is<br />

mostly insoluble in petroleum spirit.<br />

Melting point 95 °C<br />

Elemis contain high proportion of<br />

liquid sesquiterpenes. Soft and<br />

malleable with strong citrus odour.<br />

Used as plasticizing components of<br />

varnishes though this effect may<br />

disappear as more volatile<br />

components evaporate<br />

Resin of plant origin (originally from<br />

tree with chemistry similar to<br />

Araucariaceae) modified over<br />

geological time scales. Found chiefly<br />

on shores of Baltic. Used in<br />

jewellery, for decorating and<br />

constructing small objects and as<br />

component of oil varnish. Very hard<br />

high molecular weight polymer<br />

material only slightly soluble in<br />

organic solvents (e.g. 20% of mass<br />

soluble in ether)<br />

See Chapter 3<br />

See below<br />

Dark resinous material containing<br />

mainly esters of benzenoid acids<br />

and alcohols (cf. terpenoids).<br />

Characteristic odour of vanilla. Used<br />

as plasticizer for varnishes<br />

Comes from species of rattan palm.<br />

Used to colour spirit varnishes and<br />

for lacquering metals

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