STUDY OF LOW TOXICITY SOLVENTS AS REPLACEMENT OF XYLENE FOR THE FORMULATION OF VARNISHES USED IN THE CONSERVATION AND RESTORATION OF PAINTINGS AND POLYCHROME SCULPTURES
Keywords:
Varnish, Solvent, Xylene, Toxity, Conservation-restaurationAbstract
composed of four resins: Damar, Laropal K80®, Paraloid B72® and Regalrez 1094®, used in
Conservation-Restoration procedures for paintings and polychrome sculptures. With the
objective of finding solvents with less toxicity and equal or superior aesthetic performance in
relation to the aromatic solvent xylene, the study considered the following variables: viscosity,
vapor pressure, brightness and toxicity. The solvent isoamyl acetate P.A. showed satisfactory
results for Laropal K80®, Paraloid B72® and Regalrez 1094® resins. The ethyl acetate solvent
P.A. showed good results for Paraloid B72®. Damar, Laropal K80® and Regalrez 1094® resins
showed satisfactory results with ethyl acetate (2.6mL) + cyclohexane (7.4mL) solvent systems.
The formulation composed of isoamyl acetate (4.5mL) + cyclohexane (5.5mL) was adequate
for the formulation of all four tested resins. All proposed solvents have lower toxicity levels
than xylene.
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